A facile synthesis of 3-aryl-substituted-benzothiophenes via a lewis acid mediated cyclization of 2-arylthio-acetophenones
作者:Seongkon Kim、Jane Yang、Frank DiNinno
DOI:10.1016/s0040-4039(99)00392-5
日期:1999.4
The boron trifluoride-etherate mediated cyclization of 2-arylthio-ketones 1a-h at ambienttemperature gave 3-aryl-substituted benzothiophenes 2a-h in excellent yield. None of the rearranged 2-aryl-substituted benzothiophenes were observed.
Preferred conformations in the solid state of some α-(<i>p</i>-phenylsulfinyl)-<i>p</i>-substituted acetophenones
作者:Paulo R. Olivato、Sandra A. Guerrero、J. Zukerman-Schpector
DOI:10.1107/s0108768199008599
日期:2000.2.1
X-ray diffraction and ab initio computations of alpha-methylsulfinylacetophenone, PhC(O)CH2S(O)Me, indicated that (1) and (2) adopt in the crystal a cis1 conformation and (3) assumes a quasi-gauche geometry. The stabilization of these conformations in the crystal is discussed in terms of the dipole moment coupling, Coulombic and intramolecular charge transfer interactions between the oppositely charged