2-(Alkoxycarbonylmethylidene)-4-aryl-5- (dialkylamino)thiophen-3(2H)-ones were synthesized by condensation of N,N-(dialkyl)warylthioacetamides with dialkyl acetylenedicarboxylates. Intermediate substituted vinylic sulfides were isolated. When heated or in the presence of an acid or a base, they undergo cyclization into thiophenes.
A one-pot, three-component regiospecific synthesis of dispiropyrrolidines containing a thiophenone ring via 1,3-dipolar cycloaddition reactions of azomethine ylides
作者:Firouz Matloubi Moghaddam、Mohammad Reza Khodabakhshi、Zahra Ghahremannejad、Behzad Koushki Foroushani、Seik Weng Ng
DOI:10.1016/j.tetlet.2013.03.023
日期:2013.5
The synthesis of new dispiropyrrolidines containing a thiophenone ring has been achieved by a one-pot, three-component 1,3-dipolarcycloadditionreaction. Unsaturated thiophenone dipolarophiles were reacted with azomethine ylides, generated in situ from sarcosine and cycloketone derivatives (isatin, ninhydrin, acenaphthoquinone), to produce the corresponding cycloadducts in good yields (70–90%). The
作者:M. F. Kosterina、Yu. Yu. Morzherin、A. V. Tkachev、T. V. Rybalova、Yu. V. Gatilov、V. A. Bakulev
DOI:10.1023/a:1015868201847
日期:——
2-(Alkoxycarbonylmethylidene)-4-aryl-5- (dialkylamino)thiophen-3(2H)-ones were synthesized by condensation of N,N-(dialkyl)warylthioacetamides with dialkyl acetylenedicarboxylates. Intermediate substituted vinylic sulfides were isolated. When heated or in the presence of an acid or a base, they undergo cyclization into thiophenes.