Diastereoselective Manipulations of Bicyclo[<i>m</i>.1.0]alkane Derivatives. 4. Reactions of Nucleophiles with Bicyclo[<i>m</i>.1.0]alk-3-en-2-ones
作者:Eugene A. Mash、Timothy M. Gregg、James A. Baron
DOI:10.1021/jo971359h
日期:1997.11.1
of lithium diorganocuprates were highly diastereoselective for the 8- and 12-membered enones but were not diastereoselective for the 15-membered enone. All reactions were chemically efficient. The diastereoselectivities observed for 1,2-additions, which are thought to involve early transition states, can be rationalized by consideration of the low-energy conformations of each cyclopropylenone. The