Organic synthesis using ptc-5: Nucleophilic aromatic substitution under liquid-liquid and solid-liquid phase transfer conditions
作者:Paramjit Singh、Geeta Arora
DOI:10.1016/s0040-4020(01)81714-2
日期:1988.1
The reaction of 1-chloro-4-nitrobenzene(l) with dithiols generated in situ from thiouronium salts(2) under PT conditions, which in turn have been procured by the reaction of appropriate α,ω-dibromoalkanes with thiourea have been investigated. The reactions of (1) with various diols have also been investigated and their reaction mechanism is discussed.
A novel bisheterocyclic compound represented by general formula (I), which is useful as a hypoglycemic drug, and a novel hypoglycemic drug containing the same, wherein R¹ and R² are the same or different from each other and each represents (a), (b), (c), (d) or (e); R³ represents hydrogen, acetylamino or lower alkyl which may be substituted with carboxyl or sulfoxy; X and Y are the same or different from each other and each represents oxygen, sulfur or NH; B¹ and B² represent a benzene or naphthalene ring which may be substituted with lower alkyl; L¹ and L² are the same or different from each other and each represents a single bond, oxygen, sulfur, sulfinyl or sulfonyl; A represents a single bond, linear or branched alkylene, C₂ to C₆ lower alkenylene or alkynylene; and n is 0 or 1.