748155-24-0Relevant academic research and scientific papers
New heterocycles: 4-Methyl-2H-pyrano[6,5-f]cycloalka[2,1-b]2H-chromen-2- ones
Zhang, Qian,Chen, Ying,Xia, Yi,Yang, Zhengyu,Xia, Peng
, p. 1637 - 1643 (2007/10/03)
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.
