作者:John R. Grunwell、Michael F. Wempe、Judith Mitchell、Jocelyn R. Grunwell
DOI:10.1016/s0040-4039(00)79277-x
日期:1993.11
The acid catalyzed rearrangement of 5-cyclodecynone to bicyclo[4.4.0]-1(6)-decen-2-one has been shown by carbon thirteen labeling experiments to proceed by a mechanism that does not involve an enol of 5-cyclodecynone
Wempe Michael F., Grunwell John R., J. Org. Chem, 60 (1995) N 9, S 2714-2720
作者:Wempe Michael F., Grunwell John R.
DOI:——
日期:——
The Transannular Rearrangement of 5-Cyclodecynone
作者:Michael F. Wempe、John R. Grunwell
DOI:10.1021/jo00114a018
日期:1995.5
The acid-catalyzed rearrangement of 5-cyclodecynone (1) to bicyclo[4.4.0]-1(6)-decen-2-one (5) has been investigated via C-13 and deuterium labeling experiments, which showed that the transannular rearrangement proceeds by a mechanism not involving an enol of 5-cyclodecynone. Subjecting 5-cyclodecynone to NBS in ethyl ether resulted in the formation of a dibromooxetane 21 which arose from a bromo allylic alcohol 20 formed from 5-cyclodecynone and HBr. The chloro allylic alcohol 28 was formed from HCl and was subsequently converted to enone 5. Pathways were investigated using AM1 calculations. As a result, a modified mechanism consistent with all the experimental data is proposed for the acid-catalyzed rearrangement of 1 to 5.