Beta-alkylidene phenethyl alcohols, organoleptic uses thereof and
申请人:International Flavors & Fragrances Inc.
公开号:US04756840A1
公开(公告)日:1988-07-12
Described is the novel compound genus, the beta-alkylidene phenethyl alcohols of our invention, defined according to the generic structure: ##STR1## (wherein R.sub.1 represents hydrogen or methyl, useful in augmenting or enhancing the aroma of consumable materials including perfumes, colognes and perfumed articles including solid or liquid anionic, cationic, nonionic or zwitterionic detergents, fabric softener articles, fabric softener compositions, cosmetic powders and hair preparations).
Beta-alkylidene phenethyl alcohol esters and ethers, organoleptic uses
申请人:International Flavors & Fragrances Inc.
公开号:US04772583A1
公开(公告)日:1988-09-20
Described is the novel compound genus the beta-alkylidene phenethyl alcohol esters and ethers of our invention defined according to the generic structure: ##STR1## wherein R.sub.5 represents hydrogen or methyl; wherein R.sub.6 represents one of the moieties: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents the same or different hydrogen or methyl; wherein R.sub.7 represents methyl or ethyl; and wherein R.sub.8 represents hydrogen or methyl; useful in augmenting or enhancing the aroma of consumable materials including perfumes, colognes and perfumed articles including solid or liquid anionic, cationic, nonionic or zwitterionic detergents, fabric softener articles, fabric softener compositions, cosmetic powders and hair preparations.
Rhodium(I)-Catalyzed Decarbonylative Spirocyclization through CC Bond Cleavage of Benzocyclobutenones: An Efficient Approach to Functionalized Spirocycles
作者:Tao Xu、Nikolas A. Savage、Guangbin Dong
DOI:10.1002/anie.201310149
日期:2014.2.10
The rhodium‐catalyzed formation of all‐carbon spirocenters involves a decarbonylative coupling of trisubstituted cyclic olefins and benzocyclobutenones through CC activation. The metal–ligand combination [Rh(CO)2Cl}2]/P(C6F5)3 catalyzed this transformation most efficiently. A range of diverse spirocycles were synthesized in good to excellent yields and many sensitive functional groups were tolerated
Irradiation of a bichromophoric 1-(o-cyanobenzyloxy)-2-(p-methoxyphenyl)-2-butene (1a) in cyclohexane gave an isoquinoline derivative, 8-methoxy-6-methyl-11,13-dihydro[2]benzoxepino[5,4-c]isoquinoline (2a). The structure was determined by X-ray analysis. The formation of 2a can be accounted for by the initial cycloaddition of 1a in the excited singlet state between the C=C double bond and C≡N triple bond, followed by cleavage of the resulting azetine ring and recyclization.