[4R]-3-(.omega.-Aroylpropionyl)-4-thiazolidinecarboxylic acids and esters
申请人:American Cyanamid Company
公开号:US04374249A1
公开(公告)日:1983-02-15
This disclosure describes novel [4R]-3-(.omega.-aroylpropionyl)-4-thiazolidinecarboxylic acids and esters and the cationic salts thereof which are useful as hypotensive agents in mammals.
Photoinduced Deaminative Alkylation for the Synthesis of γ-Ketoesters via Electron Donor–Acceptor Complex Formation
作者:Jia-Xin Wang、Wei Ge、Wei-Long Xing、Ming-Chen Fu
DOI:10.1021/acs.joc.1c02499
日期:2021.12.17
Visible-light-induced deaminative alkylation of Katritzky salts with silyl enol ethers has been developed. The reaction can proceed efficiently through electron donor–acceptor complexformation, avoiding the use of precious metal complexes or synthetically elaborate organic dyes. A series of functionalized γ-ketoesters was successfully obtained with good functional group tolerance and compatibility under mild
synthesis of α,α-bisthiofunctionalized butenolide compounds has been successfully developed. The bis-sulfenylation of γ-substituted butenolides at α-position is promoted by using triethylamine as the catalyst and N-(aryl(alkyl)sulfanyl)succinimides or N-(phenylsulfanyl)phthalimides as sulfenylating reagents under mild reaction conditions. A range of α-sulfenylated butenolide derivatives could be smoothly obtained
The ability of a chiral isothiourea to promote the regio- and enantioselective O- to C-carboxyl transfer of a series of 3-alkyl-5-aryl- and 5-methyl-3-phenylfuranyl carbonates is examined, generating preferentially the α-regioisomers (α/γ up to 83:17) with high asymmetric induction (up to 83% ee).
Catalytic asymmetric coupling of vinylogous species <i>via</i> deconjugated butenolide addition to vinylogous imines <i>in situ</i> generated from arylsulfonyl indoles
An efficient catalytic asymmetric coupling of vinylogous species is developed via deconjugated butenolide addition to vinylogousimines in situgeneratedfromarylsulfonylindoles. With quinine-derived bifunctional squaramide as the catalyst, a series of structurally diverse enantioenriched sec-alkyl-3-substituted indoles containing valuable γ,γ-disubstituted butenolide moieties and adjacent quaternary-tertiary