Abstract: Disclosed are a mild and efficient preparation method for an ?-acyloxyenamide compound and a use thereof in the synthesis of an amide and a polypeptide. The ?-acyloxyenamide compound is obtained by an addition reaction of a ynamide and a carboxylic acid in dichloromethane under conditions where the temperature is 0° C. to 50° C.; the produced ?-acyloxyenamide compound can react with an amine compound to produce an amide or a polypeptide; the two reactions can be carried out step by step, and can also be carried out in one pot. According to the invention, the reaction conditions are mild and no metal catalyst is required; when the carboxylic acid, which has chirality on an alpha site of carboxyl, forms an amide bond or a peptide bond, no racemization occurs; and the operation is simple and the application range is wide.

Abstract: An electrical connector includes an insulative housing and a plurality of contacts retained within the housing as a contact module. The housing includes a base and a mating tongue forwardly extending from the base. The contacts are arranged with two rows contacting sections respectively exposed upon two opposite surfaces of the mating tongue, and one row mounting sections for mounting to a same plane of a printed circuit board. Each contact has a linking section between the contacting section and the mounting section. The contacts are grouped by one grounding contact associated with a pair of neighboring differential pair signal contacts in an isosceles triangular configuration wherein the grounding contact is located at the top apex. The linking section of grounding contact of the outermost group is widened compared with those of the remaining contacts for lowering the corresponding impedance.

Abstract: Disclosed are a mild and efficient preparation method for an ?-acyloxyenamide compound and a use thereof in the synthesis of an amide and a polypeptide. The ?-acyloxyenamide compound is obtained by an addition reaction of a ynamide and a carboxylic acid in dichloromethane under conditions where the temperature is 0° C. to 50° C.; the produced ?-acyloxyenamide compound can react with an amine compound to produce an amide or a polypeptide; the two reactions can be carried out step by step, and can also be carried out in one pot. According to the invention, the reaction conditions are mild and no metal catalyst is required; when the carboxylic acid, which has chirality on an alpha site of carboxyl, forms an amide bond or a peptide bond, no racemization occurs; and the operation is simple and the application range is wide.

Abstract: An electrical connector with an insulative housing and a plurality of contacts retained thereto. The housing includes a base and a tongue extending forwardly from the base. Each first contact includes, along the front-to-back direction perpendicular to the transverse direction, a front first contacting section, exposed above a mating face of the tongue, a rear first soldering section extending out of the housing, and a first connecting section located therebetween wherein in the pair of first different contacts, the first connecting sections are transversely offset from the corresponding first contacting sections and toward each other so as to have therebetween a distance, in the transverse direction, smaller than that between the corresponding first contacting sections.

Abstract: The present invention relates to resin composite materials, and more particularly, to low-dielectric resin composition and prepreg, resin film, resin coated copper, laminate and printed circuit board formed therefrom. The low-dielectric resin composition includes a phosphorus-containing flame retardant as shown in formula (I) and a resin with an active unsaturated bond. The low-dielectric resin composition may further be manufactured as a prepreg, a resin film, a resin coated copper, a laminate, or a printed circuit board, having a high glass transition temperature, low dielectric property, halogen-free flame retardancy and low percent of thermal expansion of laminate.

Abstract: The invention discloses a connecting device of street lamp pole. The connecting device comprises a first connecting piece and a second connecting piece; the first connecting piece and the second connecting piece are arranged in an independent split mode; one end of the first connecting piece is used for connecting a street lamp holder, and the other end is provided with a mortise; one end of the second connecting piece is used for connecting the lamp pole, and the other end is provided with a tenon capable of being inserted into the mortise; and the mortise is provided with a first combining hole, the tenon is provided with a second combining hole, and when the tenon is inserted into the mortise, the first connecting piece and the second connecting piece are fixed by inserting a bolt into the first combining hole and the second combining hole. According to the invention, the street lamp and connecting device are convenient for mounting, disassembly and maintenance.

Abstract: An electrical connector includes an insulative housing and a plurality of contacts retained within the housing as a contact module. The housing includes a base and a mating tongue forwardly extending from the base. The contacts are arranged with two rows contacting sections respectively exposed upon two opposite surfaces of the mating tongue, and one row mounting sections for mounting to a same plane of a printed circuit board. Each contact has a linking section between the contacting section and the mounting section. The contacts are grouped by one grounding contact associated with a pair of neighboring differential pair signal contacts in an isosceles triangular configuration wherein the grounding contact is located at the top apex. The linking section of grounding contact of the outermost group is widened compared with those of the remaining contacts for lowering the corresponding impedance.

Abstract: The invention discloses a connecting device of street lamp pole. The connecting device comprises a first connecting piece and a second connecting piece; the first connecting piece and the second connecting piece are arranged in an independent split mode; one end of the first connecting piece is used for connecting a street lamp holder, and the other end is provided with a mortise; one end of the second connecting piece is used for connecting the lamp pole, and the other end is provided with a tenon capable of being inserted into the mortise; and the mortise is provided with a first combining hole, the tenon is provided with a second combining hole, and when the tenon is inserted into the mortise, the first connecting piece and the second connecting piece are fixed by inserting a bolt into the first combining hole and the second combining hole. According to the invention, the street lamp and connecting device are convenient for mounting, disassembly and maintenance.

Abstract: Disclosed are a mild and efficient preparation method for an ?-acyloxyenamide compound and a use thereof in the synthesis of an amide and a polypeptide. The ?-acyloxyenamide compound is obtained by an addition reaction of a ynamide and a carboxylic acid in dichloromethane under conditions where the temperature is 0° C. to 50° C.; the produced ?-acyloxyenamide compound can react with an amine compound to produce an amide or a polypeptide; the two reactions can be carried out step by step, and can also be carried out in one pot. According to the invention, the reaction conditions are mild and no metal catalyst is required; when the carboxylic acid, which has chirality on an alpha site of carboxyl, forms an amide bond or a peptide bond, no racemization occurs; and the operation is simple and the application range is wide.

Abstract: The present invention provides compounds of the Formula below wherein R, R1-R3 are as described herein; methods of treating patients for diabetes using the compounds, and processes for preparing the compounds.

Abstract: The present disclosure illustrates an ultra-thin dual-channel flexible circuit bridge connector including a dual-channel flexible circuit board, a first connection interface and a second connection interface. The dual-channel flexible circuit board includes, in a sequential order, a first insulating layer, a first circuit layer, a second insulating layer, a ground layer, a third insulating layer, a second circuit layer and a fourth insulating layer. The first connection interface and the second connection interface can be used to link two extend interface cards spaced apart by various distances, thereby forming a bridge status. The ground layer between the first circuit layer and the second circuit layer can be served as a common reference plane for dual-channel high frequency signal transmission and provide shielding and isolating effect, so as to satisfy the requirement for working bandwidth to satisfy the requirement for characteristic impedance, reduce skin effect, reduce EMI and crosstalk interference.

Abstract: An electrical connector includes an insulative housing enclosing a plurality of terminals and enclosed within a metallic shell. The shell forms a receiving cavity in which said housing is retained. The shell includes opposite top and bottom plates with a plurality of spring tangs split therefrom and extending into the receiving cavity. A top extension unitarily extends rearwardly from a front edge of the top plate and includes a front stationary base section intimately positioned upon the top plate, and a rear deflectable section including a plurality of spring fingers rearwardly extending from a rear end of the front base section in an oblique manner away from the top plate. The front base section forms a plurality of openings corresponding to free ends of the spring tangs for accommodating the corresponding free ends, respectively.

Abstract: The present invention provides compounds of the Formula below wherein R, R1-R3 are as described herein; methods of treating patients for diabetes using the compounds, and processes for preparing the compounds

Abstract: The present disclosure illustrates a dual-channel flexible circuit bridge connector and a dual graphics card system using the same. The dual-channel flexible circuit bridge connector includes a dual-channel flexible circuit board, a first connection interface and a second connection interface. The dual-channel flexible circuit board includes, in a sequential order, a first insulating layer, a first circuit layer, a second insulating layer, a ground layer, a third insulating layer, a second circuit layer and a fourth insulating layer. The first connection interface and the second connection interface can be used to link two graphics cards spaced apart by a non-fixed distance, thereby forming a bridging status. Therefore, the dual graphics card system can manipulate two graphics cards to perform parallel computation, so as to achieve better efficiency in computing process and graphics display.

Abstract: Provided is a phosphaphenanthrene-based compound represented by the following chemical structure: The phosphaphenanthrene-based compound can be added in a resin composition and made into a prepreg or resin film. The prepreg or resin film made from such resin composition has low coefficient of thermal expansion, low dielectric constant and dissipation factor, and flame retardancy, thereby being suitable for copper-clad laminate or printed circuit board.

Abstract: The present invention provides compounds of the Formula (Ia) wherein R is selected from the group consisting of CH3, CH(CH3)2, CH2CN, CH2CHF2, CH2CF3, (A), (B), (C), (D), (E), (F), CH2CH2OCH3, and CH2C(O)OCH(CH3)2; R1 is selected from the group consisting of CF3, OCF3, and Cl; R2 is selected from the group consisting of H and F; or a pharmaceutically acceptable salt thereof.

Abstract: An electrical connector includes an insulative housing enclosing a plurality of terminals and enclosed within a metallic shell. The shell forms a receiving cavity in which said housing is retained. The shell includes opposite top and bottom plates with a plurality of spring tangs split therefrom and extending into the receiving cavity. A top extension unitarily extends rearwardly from a front edge of the top plate and includes a front stationary base section intimately positioned upon the top plate, and a rear deflectable section including a plurality of spring fingers rearwardly extending from a rear end of the front base section in an oblique manner away from the top plate. The front base section forms a plurality of openings corresponding to free ends of the spring tangs for accommodating the corresponding free ends, respectively.

Abstract: The present invention provides compounds of the Formula (Ia) wherein R is selected from the group consisting of CH3, CH(CH3)2, CH2CN, CH2CHF2, CH2CF3, (A), (B), (C), (D), (E), (F), CH2CH2OCH3, and CH2C(O)OCH(CH3)2; R1 is selected from the group consisting of CF3, OCF3, and Cl; R2 is selected from the group consisting of H and F; or a pharmaceutically acceptable salt thereof.

Abstract: The present invention relates to resin composite materials, and more particularly, to low-dielectric resin composition and prepreg, resin film, resin coated copper, laminate and printed circuit board formed therefrom. The low-dielectric resin composition includes a phosphorus-containing flame retardant as shown in formula (I) and a resin with an active unsaturated bond. The low-dielectric resin composition may further be manufactured as a prepreg, a resin film, a resin coated copper, a laminate, or a printed circuit board, having a high glass transition temperature, low dielectric property, halogen-free flame retardancy and low percent of thermal expansion of laminate.

Abstract: Provided is a phosphaphenanthrene-based compound represented by the following chemical structure: The phosphaphenanthrene-based compound can be added in a resin composition and made into a prepreg or resin film. The prepreg or resin film made from such resin composition has low coefficient of thermal expansion, low dielectric constant and dissipation factor, and flame retardancy, thereby being suitable for copper-clad laminate or printed circuit board.