The acid thermal decomposition products of natural chrysanthemumdicarboxylic acid
作者:L. Crombie、Christine F. Doherty、Gerald Pattenden、D. K. Woods
DOI:10.1039/j39710002739
日期:——
Thermaldecomposition of chrysanthemumdicarboxylicacid (1b) produces a mixture of acidic and neutral products and liberates ca. 0·7 mol. equiv. of carbon dioxide. Separation and identification of the methyl esters of the six acidicproducts has shown that the acids are cis(Z)- and trans(E)-norchrysanthemic acid [(2a) and (9)], trans(E)-2,6-dimethylhepta-4,6-dienoic acid (5), cis(Z)- and trans(E)-2
Method for producing 2,2-dimethyl-3-(1-propenyl)cyclopropanecarboxylate ester
申请人:——
公开号:US20010014755A1
公开(公告)日:2001-08-16
An ester compound, which is a production intermediate of a pyrethroid compound, given by formula
1
wherein R
1
represents C
1-6
alkyl group, etc., can be produced by allowing to react an aldehyde compound given by formula
2
wherein R
1
has the same meaning above, with a phosphorane compound given by formula
3
wherein R
2
represents a hydrogen atom, halogen atom or C
1-4
alkyl group, in an organic solvent, and obtaining a liquid distillate by heating the above reaction mixture with water in high yield.