Rearrangement of bicyclo [2.2. 1] heptane ring systems by titanocene alkylidene complexes to bicyclo [3.2. 0] heptane enol ethers. Total synthesis of (.+-.)-. DELTA. 9 ( …

…, BD Santarsiero, RH Grubbs

Index: Stille, John R.; Santarsiero, Bernard D.; Grubbs, Robert H. Journal of Organic Chemistry, 1990 , vol. 55, # 3 p. 843 - 862

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Citation Number: 104

Abstract

In recent years, titanium-catalyzed olefin metathesis has become a very well understood process. Titanium complexes capable of generating the titanocene methylidene species (1, eq 1) have been shown to display catalytic metathesis activity. Initially, the dimethylaluminum chloride adduct 3 was isolated by Tebbe and co-workers and found to slowly catalyze the selective exchange of