2??Phosphaindolizines

…, K Karaghiosoff, A Schmidpeter, C Spindler

Index: Bansal, Raj K.; Karaghiosoff, Konstantin; Gupta, Neelima; Schmidpeter, Alfred; Spindler, Claudia Chemische Berichte, 1991 , vol. 124, # 3 p. 475 - 480

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Citation Number: 55

Abstract

Pyridinium bromides 3 prepared by alkylation of 2-methyl-, 2-ethyl-, and 2-benzylpyridines 1 with methyl bromides 2 bearing an electron-withdrawing group (COPh, CN, C02Et, C6H4NO2) are condensed with PC1, in the presence of Et3N to give 2-phosphaindolizines 4. The 1-unsubstituted representatives 9 (prepared from 8) may undergo a substitution reaction at this position with an excess of PC13 1-and 2-phosphaindolizines are 1, 3- ...