SYNTHESIS OF SULFUR-CONTAINING ARYLIMINOPHOSPHORANES
摘要:
Stabilized phosphoranes, obtained, from the three-component reaction between. dialkyl acetylenedicarboxylates and arylsalfonamides in the presence of triplienylphosphine, undergo a smooth intramolecular reaction in boiling toluene to produce sulfur-containing iminophosphoranes in excellent yields.
An Easy One-Pot Procedure for the Synthesis of N-Sulfonyl Phosphorous Ylides and Sulfonyl Iminophosphoranes
摘要:
Reaction of triphenylphosphine and an electron deficient acetylenic ester in the presence of strong N-H acid such as alkyl and aryl sulfamides or acetamide produces phosphorous ylides at room temperature in CH2Cl2. The aryl sulfamide phosphoranes undergo a smooth transformation reaction in boiling toluene and produce iminophosphoranes.
Three-component reaction of arylsulfonamides, dialkyl acetylenedicarboxylates, and ethyl chlorooxoacetate promoted by triphenylphosphine and triethylamine provides a sufficient route for the synthesis of dialkyl N-(arylsulfonyl)-4-ethoxy-5-oxo-2,5-dihydro-1H-pyrolle-2,3-dicarboxylates in good yields. (C) 2011 Hossein Anaraki-Ardakani. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.