Ac. Guevel et Dj. Hart, SYNTHESIS OF CARBOCYCLES VIA INTRAMOLECULAR CONJUGATE ADDITIONS - ANOTHER SOLUTION TO THE TERPENOID SIDE-CHAIN STEREOCHEMISTRY PROBLEM, Journal of organic chemistry, 61(2), 1996, pp. 465-472
Intramolecular conjugate additions of keto esters 7-11, mediated by py
rrolidine-acetic acid, provide perhydroindans or bicyclo[6.3.0]undecan
es with high levels of diastereoselectivity at the acyclic stereogenic
center. Levels of acyclic diastereoselection depend on starting unsat
urated ester olefin geometry.