Synthesis of C60-fused tetrahydrothiophene derivatives via nucleophilic cycloaddition of thiocyanates
作者:Guan-Wu Wang、Jia-Xing Li、Yu Xu
DOI:10.1039/b807394e
日期:——
Nucleophilic cycloaddition of thiocyanates 1a–e with C60 in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene afforded C60-fused 2-iminotetrahydrothiophene derivatives 2a–e and methanofullerenes 3a–d. The product distributions were highly sensitive to the substrates employed. The 2-iminotetrahydrothiophene derivatives 2a–e could be further manipulated by hydrolysis and acetylation to give 2-oxotetrahydrothiophene derivatives 4a–e and 2-acetamidotetrahydrothiophene derivatives 5a–e. A possible reaction mechanism for the formation of products 2a–e and 3a–d was proposed.
Mercaptoacetate Derivatives. I. Reaction of Thiocyanatoacetic Esters with Aldehydes
作者:Toshio Hayashi
DOI:10.1246/bcsj.45.1507
日期:1972.5
An equimolar reaction of thiocyanatoacetic esters with aromatic aldehydes in the presence of sodium hydride, followed by treatment with hydrogen chloride, led to a mixture of 4-alkoxycarbonyl-5-aryl-2-imino-1,3-oxathiolane hydrochloride (3) and α-(S-carbamoylthio)-βchlorodihydrocinnamic ester (4). When excess aldehyde was used in the reaction, a small amount of 2,10-bis(α-chlorobenzyl)-4,8-dioxo-6-phenyl-5