Heterocycles

New heterocycles: 4-methyl-2H-pyrano [6, 5-f] cycloalka-[2, 1-b] 2H-chromen-2-ones

Q Zhang, Y Chen, Y Xia, Z Yang, P Xia

Index: Zhang, Qian; Chen, Ying; Xia, Yi; Yang, Zhengyu; Xia, Peng Heterocycles, 2004 , vol. 63, # 7 p. 1637 - 1643

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Citation Number: 2

Abstract

Résumé/Abstract A synthesis of the new heterocycles, 4-methyl-2H-pyrano [6, 5-f] cycloalka [2, 1-b] 2H-chromen-2-ones (3) was described, via the unexpected intermediates 2-chloro-1- chloroethenylidenecycloalkanes (6) from the reaction of 1-ethynylcycloalkanols with thionyl chloride. The mechanism of some steps was discussed.

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