Synthesis of (3a<i>R</i>*,6a<i>R</i>*)-2,2,5,6-Tetramethyl-1,2,3,3a,4,6a-hexahydropentalene: A Potential Precursor of Protoilludane Sesquiterpenes
作者:Lutz Fitjer、Ralf Gerke、Thorsten Anger
DOI:10.1055/s-1994-25593
日期:——
Acid-catalyzed rearrangement of 3,3,3′,3′-tetramethyl-1,1′-bi(cyclobutylidene) (8) results in the formation of (3aR*,6aR*)-2,2,5,6-tetramethyl-1,2,3,3a,4,6a-hexahydropentalene [(3aR*,6aR*)-9], a potential precursor of protoilludane sesquiterpenes. Compound 8 is prepared by oxidation and in situ coupling of cyclobutylidenephospborane 7.
3,3,3',3'-四甲基-1,1'-双(环丁叉) (8) 的酸催化重排导致形成 (3aR*,6aR*)-2,2,5,6-四甲基-1,2,3,3a,4,6a-六氢戊烯[(3aR*,6aR*)-9],原伊鲁丹倍半萜的潜在前体。化合物8是通过环亚丁基磷硼烷7的氧化和原位偶联制备的。