2-(chloromethyl)-3-tosylpropene as useful reagent for the general synthesis of functionalized 2-substituted 1,3-dienes. Application to the synthesis of (±)-ipsenol
作者:Carmen Nájera、José Miguel Sansano
DOI:10.1016/s0040-4039(00)79227-6
日期:1993.6
The reaction of the monolithium derivative of 2-(chloromethyl)-3-tosylpropene (2) with bromomethyltrimethylsilane affords the β-silyl sulfone 7. which after nucleophilic substitution followed by fluoride induced β-elimination of tosyltrimethylsilane gives 2-substituted conjugated dienes 1. When compounds 7 reacts first with zinc in the presence of isovaleraldehyde and then with tetrabutylammonium fluoride
A general method for the synthesis of 2-alkyl substituted 1,3-dienes starting from 2-(chloromethyl)-3-tosylpropene
作者:Carmen Nájera、José Miguel Sansano
DOI:10.1016/s0040-4020(01)85650-7
日期:1994.1
The alkylation of the monolithium derivative 5 of 2-(chloromethyl)-3-tosylpropene (1) with bromo- or iodo-methyltrimethylsilane affords the β-silyl sulfone 7, which after nucleophilic substitution of the chlorine atom followed by β-elimination of tosyltrimethylsilane, promoted by tetrabutylammonium fluoride (TBAF), gives 2-substituted conjugated dienes 6 and the outer-ring diene 14. Racemic ipsenol
(METH)ACRYLIC RESIN AND METHOD FOR CONTROLLING STRAIN THEREOF
申请人:Osaka Organic Chemical Industry Ltd.
公开号:EP3604358A1
公开(公告)日:2020-02-05
The purpose of the present invention is to provide a method for manufacturing a polymer having a desired strain. Provided is a method for manufacturing a polymer having a desired strain, said method comprising: a step for polymerizing one or more kinds of starting monomers by irradiating with ultraviolet rays having such an illuminance as to generate the desired strain; and, if required, a step for measuring the strain of the polymers thus formed and selecting a polymer having the desired strain. In one embodiment, provided is a method for determining the illuminance of ultraviolet rays for manufacturing a polymer having a desired strain.