Diastereoselective synthesis of cis-1,2-disubstituted cyclopropanols and cyclopent-3-enols via SmI2 mediated C–N(Bt) bond cleavage
摘要:
Diastereoselective synthesis of cis-1,2-disubstituted cyclopropanols and cyclopent-3-enols has been achieved from readily available beta-benzotriazolyl ketones (beta-Bt ketones) via a C-N(Bt) bond cleavage/cyclization process promoted by SmI2/HMPA. (C) 2015 Elsevier Ltd. All rights reserved.
Intramolecular heterocyclization of α,β-unsaturated ketone thiosemicarbazones
作者:I. N. Klochkova、A. A. Anis’kov
DOI:10.1134/s1070428009010205
日期:2009.1
Intramolecular heterocyclization of thiosemicarbazones derived from α,β-enones under acid activation of one nucleophilic center afforded previously unknown 2-(2-arylethenyl)-2,3-dihydro-1,3,4-thiadiazoles. The transformation involves the thiol tautomer of thiosemicarbazone without participation of the conjugated carbon-carbondoublebond.