Stereospecific routes to the isomeric 7-bromo-7-lithionorcaranes
作者:Dietmar Seyferth、Robert L. Lambert
DOI:10.1016/s0022-328x(00)82047-1
日期:1973.7
anti-7-Bromo-syn-7-lithionorcarane can be prepared stereospecifically by the reaction of n-butyllithium with 7,7-dibromonorcarane in THF, provided that a slight excess of the dibromo compound is present and the temperature is allowed to rise briefly from −107° to about −93°. syn-7-Bromo-anti-7-lithionorcarane results when n-butyllithium is allowed to react with syn-7-bromo-anti-7-trimethyltinnorearane