Patents by Inventor Ayman Sahli
Ayman Sahli has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9738602Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: GrantFiled: December 18, 2015Date of Patent: August 22, 2017Assignee: Wyeth LLCInventors: George Anello Chiarello, Ayman Sahli
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Publication number: 20160176809Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: ApplicationFiled: December 18, 2015Publication date: June 23, 2016Applicant: WYETH LLCInventors: George Anello CHIARELLO, Ayman SAHLI
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Patent number: 9227924Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: GrantFiled: October 2, 2014Date of Patent: January 5, 2016Assignee: WYETH LLCInventors: George Anello Chiarello, Ayman Sahli
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Publication number: 20150099865Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: ApplicationFiled: October 2, 2014Publication date: April 9, 2015Applicant: WYETH LLCInventors: George Anello CHIARELLO, Ayman SAHLI
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Patent number: 8853451Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: GrantFiled: January 31, 2013Date of Patent: October 7, 2014Assignee: Wyeth LLCInventors: George Anello Chiarello, Ayman Sahli
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Publication number: 20130211053Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: ApplicationFiled: January 31, 2013Publication date: August 15, 2013Applicant: WYETH LLCInventors: George Anello CHIARELLO, Ayman SAHLI
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Patent number: 8383857Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: GrantFiled: January 27, 2012Date of Patent: February 26, 2013Assignee: Wyeth LLCInventors: George Anello Chiarello, Ayman Sahli
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Publication number: 20120130052Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: ApplicationFiled: January 27, 2012Publication date: May 24, 2012Applicant: WYETH LLCInventors: George Anello CHIARELLO, Ayman SAHLI
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Patent number: 8110705Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: GrantFiled: May 20, 2008Date of Patent: February 7, 2012Assignee: Wyeth LLCInventors: George Anello Chiarello, Ayman Sahli
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Patent number: 7622578Abstract: A scalable process for the preparation of a rapamycin 42-ester by reacting a rapamycin 42-ester boronate with a diol and purifying crude rapamycin 42-ester by recrystallization and treatment with a diol is provided. Also provided is a method for isolating and purifying a rapamycin 42-ester boronate from mother liquors comprising acetone and rapamycin contaminants.Type: GrantFiled: December 6, 2006Date of Patent: November 24, 2009Assignee: WyethInventors: Chunhao Zhang, Clifford William Coughlin, Anthony Pilcher, Adam P. Michaud, James S. Farina, Ayman Sahli
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Publication number: 20080312422Abstract: A method is disclosed for preparing hydrazides from hydrazine and an acyl chloride which comprises the steps of (a) preparing a stirred substantially uniform slurry comprising hydrazine and an inert solvent at low temperature; and (b) adding an acyl chloride continuously to said slurry. The method avoids or limits production of undesired bis-hydrazide by-products. The method is used to prepare 3-methyl-3-mercaptobutanoic acid hydrazide, a molecule used to link calicheamicin to a monoclonal antibody.Type: ApplicationFiled: May 20, 2008Publication date: December 18, 2008Applicant: WyethInventors: George Anello Chiarello, Ayman Sahli
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Publication number: 20070129541Abstract: A scalable process for the preparation of a rapamycin 42-ester by reacting a rapamycin 42-ester boronate with a diol and purifying crude rapamycin 42-ester by recrystallization and treatment with a diol is provided. Also provided is a method for isolating and purifying a rapamycin 42-ester boronate from mother liquors comprising acetone and rapamycin contaminants.Type: ApplicationFiled: December 6, 2006Publication date: June 7, 2007Applicant: WyethInventors: Chunhao Zhang, Clifford Coughlin, Anthony Pilcher, Adam Michaud, James Farina, Ayman Sahli
