The Substitution Reaction of 2-Aralkylthio-1-alkenyl and 2-Alkylsulfinyl-1-alkenyl Ketones with Alkoxides: Preparation of 2-Alkoxy-1-alkenyl Ketones
作者:Takehiko Nishio、Yoshimori Omote
DOI:10.1055/s-1980-29303
日期:——
The Substitution Reaction of 2-Alkylthio-1-alkenyl and 2-Alkylsulfinyl-1-alkenyl Ketones with Amines: Preparation of 2-Amino-1-alkenyl Ketones
作者:Takehiko Nishio、Yoshimori Omote
DOI:10.1055/s-1980-29032
日期:——
Attempted Simmon–Smith reaction on β-alkylthio-α,β-unsaturated ketones: a regiospecific synthesis of 2,4-disubstituted thiophenes
作者:Toreshettahally R. Swaroop、Rangaswamy Roopashree、Hiriyakkanavar Ila、Kanchugarakoppal S. Rangappa
DOI:10.1016/j.tetlet.2012.10.110
日期:2013.1
A new regiospecific route to 2,4-disubstituted thiophenes has been developed through Simmon-Smith reaction on beta-methylthio-alpha,beta-unsaturated ketones. Extension of the reaction to beta-ethylibenzylthio-alpha,beta-unsaturated ketones also gave the corresponding 2,4-disubstituted thiophenes in a regiospecific manner. A probable mechanism involving a carbenoid methylene insertion to divalent sulfur followed by intramolecular aldol condensation has been suggested.[GRAPHICS](C) 2012 Elsevier Ltd. All rights reserved.
Regioselective synthesis of multisubstituted pyrazoles via cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines
作者:Weiwei Jin、Haifeng Yu、Zhengkun Yu
DOI:10.1016/j.tetlet.2011.08.168
日期:2011.11
Multisubstituted pyrazoles were efficiently synthesized by cyclocondensation of beta-thioalkyl-alpha,beta-unsaturated ketones with hydrazines under relatively mild conditions. A one-pot synthetic protocol through tandem Liebeskind-Srogl cross-coupling/cyclocondensation using alpha-oxo ketene dithioacetals as the starting materials was also realized for the same purpose. (C) 2011 Elsevier Ltd. All rights reserved.
Reaction of N-(carbamimidoyl)thiourea with 1-benzoyl-2-phenylacetylene
作者:T. E. Glotova、M. Yu. Dvorko、A. I. Albanov、N. I. Protsuk
DOI:10.1134/s1070428007010162
日期:2007.1
1-Benzoyl-2-phenylacetylene reacted with N-(carbamimidoyl)thiourea in glacial acetic acid saturated with 20% HBr to give (4,6-diphenyl-2H-1,3-thazin-2-ylidene)guanidine hydrobromide. The reaction of the same compounds in anhydrous ethanol in the presence of sodium ethoxide led to the formation of N-(4,6-diphenylpyrimidin-2-yl)thiourea. Bis(3-oxo-1,3-diphenylprop-1-en-1-yl) sulfide and 1-benzoyl-2-ethylsulfanyl-2-phenylethylene were isolated in the reactions of 1-benzoyl-2-phenylacetylene with N-(carbamimidoyl)thiourea and N-(carbamimidoyl)-S-ethylisothiuronium bromide, respectively, in anhydrous methanol.