Abstract: A method of producing 1,5-pentanedial having an alkyl group at the 3-position, including a step of hydroformylating an aldehyde compound represented by the following general formula (1): wherein R1 represents an alkyl group having from 1 to 6 carbon atoms.

Abstract: A method of producing 1,5-pentanedial having an alkyl group at the 3-position, including a step of hydroformylating an aldehyde compound represented by the following general formula (1): wherein R1 represents an alkyl group having from 1 to 6 carbon atoms.

Abstract: It is provided a process for industrially advantageously producing a branched aldehyde represented by the formula; ##STR1## ?wherein Y represents an acyl group of two or more carbon atoms; and X represents an acyloxymethyl group represented by --CH.sub.2 OY' (where Y' represents an acyl group of two or more carbon atoms), cyano group or an alkoxycarbonyl group! which is useful as an intermediate for pharmaceuticals and agricultural chemicals, comprising subjecting an olefinic compound represented by the following formula; ##STR2## (wherein Y and X are the same as defined above), to the reaction with hydrogen and carbon monoxide in the presence of a rhodium compound and a tertiary organic phosphorus compound with an electronic parameter (.upsilon.-value) of 2080 to 2090 cm.sup.-1 or with a steric parameter (.theta.-value) of 150 to 180.degree..

Abstract: Described is a process for hydroformylation of an olefinic compound, which comprises, carrying out the reaction in the presence of:a) a rhodium compound,b) a tertiary organic phosphorus compound represented by the following formula (1):P(X.sub.1)(X.sub.2)(X.sub.3 --SO.sub.3 M) (1)wherein X.sub.1 and X.sub.2 each independently represents a monovalent hydrocarbon group having 1-15 carbon atoms and X.sub.

Abstract: 2-Hydroxy-4-methyltetrahydrofuran is prepared by reacting 2-methyl-2-propen-1-ol with hydrogen and carbon monoxide in the presence of:(a) a rhodium compound, and(b) tris(substituted aryl)phosphite having an electronic parameter (.nu.-value) of 2080 to 2090 cm.sup.-1 and a steric parameter (.theta.-value) of 135.degree. to 190.degree. and having formula (1): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently of each other represent a substituted aryl group having at least 7 carbon atoms, the ratio of said rhodium compound (a) to said tris(substituted aryl) phosphite (b) ranging from 110 to 1000 moles per 1 gram atom of rhodium in said rhodium compound (a).

Abstract: In hydroformylation comprising allowing an ethylenically unsaturated compound to react with carbon monoxide and hydrogen in the presence of a catalyst to convert it into a corresponding aldehyde, the catalyst is a rhodium-containing catalyst comprising;(a) a rhodium compound;(b) an organic phosphorus compound having at least one tertiary amine residual group and at least one tertiary phosphorus residual group, having the ability of coordination to said rhodium compound; and optionally(c) an acidic compound with which at least part of the tertiary amine residual group of the organic phosphorus compound is converted into ammonium ions.

Abstract: A process for producing 2-formyl-1,4-butanediol comprises effecting reaction of 2-butene-1,4-diol with hydrogen and carbon monoxide in the presence of:(a) a rhodium compound,(b) a tris(substituted aryl) phosphite having an electronic parameter, .nu.-value, of 2,080 to 2,090 cm.sup.-1 and a steric parameter, .theta.-value, of 135.degree. to 190.degree. and being represented by the formula P(OR).sub.3wherein each of R's, which may be the same or different, represents a substituted aryl group having at least 7 carbon atoms, and(c) a bis (diphenylphosphino) alkane represented by the formula Ph.sub.2 P-(CH.sub.2)n-PPh.sub.2 where n n is an integer of 2 to 6, andat a temperature of not more than 80.degree. C.

Abstract: Novel trimethylolheptanes having three highly reactive hydroxyl groups are provided. They are useful as raw materials for the production of polyesters for use in or as raw materials or modifiers for paints, inks, adhesives, coating compositions and molding resins. Uses for the trimethylolheptanes are also provided.

Abstract: A hydroformylation process is provided which comprises reacting a compound of the general formulaCH.sub.2 .dbd.CH--CH.sub.2 --A--CH.sub.2 --Xwherein X is a hydroxyl or formyl group and A is a group of the formula--(CH.sub.2).sub.n -- or --(CH.sub.2).sub.m --CH.dbd.CH--in which n is an integer of 3-8 and m is an integer of 0-5, with a mixture of hydrogen and carbon monoxide in the presence of a rhodium compound and a specific tris(substituted phenyl) phosphite.