Implementation of a combinatorial cleavage and deprotection scheme. 1. Synthesis of phthalhydrazide libraries
作者:John Nielsen、Palle H. Rasmussen
DOI:10.1016/0040-4039(96)00544-8
日期:1996.5
Phthalhydrazidelibraries are synthesized in solution from substituted hydrazines and phthalimides in several different library formats including single compounds, indexed sub-libraries and a full library. When carried out during solid-phase synthesis, this combinatorialcleavage and deprotectionscheme offers the possibility for generating a diverse library of substituted phthalhydrazides.
The effect of conformational equilibrium on rate of reactions involving neighbouring group participation
作者:A. Csámpai、Ö. Farkas
DOI:10.1016/s0040-4020(01)92238-0
日期:1992.2
bromoalkylphthalazinones type is efficiently assisted by the neighbouring hydrazinocarbonyl group. The expected order of anchimeric assistance has been found to be dependent on the chain length. The relatively large values of rate constants are due to an entropy effect firmly supported by computed analysis of the conformational equilibria for the bromoethyl chain appended to phthalazinone () and 2,3-dihydroimidazo