etherification uses toxic or hardly degradable alkylating agents. An eco-friendly tandem etherification/aromatization is presented to prepare estrone 3-secondary ethers from easily available dienone 1. Three marketed 3-etherified estrogen drugs were synthesized with the method from commercial available starting material.
Vilsmeier reaction with 14-hydroxydihydrocodeinone and derived enol ethers
作者:M.G. Lester、V. Petrow、O. Stephenson
DOI:10.1016/s0040-4020(01)99134-3
日期:1964.1
The reaction of 14-hydroxydihydrocodeinone and some of its derived 6-enol ethers with a Vilsmeier reagent, are described. Structures are proposed and reaction mechanisms suggested for the various products formed. The reaction of one of these products, 7-formyl-14-hydroxy-6-methoxy-°6,7-dihydrodeoxycodeine, with certain organic bases is discussed.
PROCESS FOR THE PRODUCTION OF 5-OXY-7-OXABICYCLO- 4.1.0]HEPT-3-E NE-3-CARBOXYLIC ACID ESTERS
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP1245569A1
公开(公告)日:2002-10-02
The present invention provides a method of producing 5-oxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic acid ester economically, industrially advantageously and efficiently in a large amount. The present invention is a method of producing 5-oxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic acid ester (X), which is shown in the following scheme.
wherein each symbol is as defined in the specification.
The present invention provides a method of producing 5-oxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic acid ester economically, industrially advantageously and efficiently in a large amount. The present invention is a method of producing 5-oxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic acid ester (X), which is shown in the following scheme.
wherein each symbol is as defined in the specification.