Vitamin-B12-Catalyzed C,C-Bond Formation. Synthesis of a california red scale pheromone
作者:Lucas Auer、Christophe Weymuth、Rolf Scheffold
DOI:10.1002/hlca.19930760205
日期:1993.3.24
A Mixture of (3S,6R)- and (3R,6R)-3-methyl-6-(1-methylethenyl)dec-9-enyl acetate (1a and 1b, respectively)–1a being a pheromone of the California red scale – is synthesized in 14 steps from (+)-(R)-limonene (4). The key step is the reductive vitamin-B12-catalyzed coupling of (R)-5-(2-iodoethyl)-6-mehtylhept-6-en-2-one ethylene acetal (8) and methyl crotonate (3).
的(将3小号,6 - [R )-和(3 - [R,6 - [R)-3-甲基-6-(1-甲基乙烯基)癸-9-烯基乙酸酯(1A和1B,分别) - 1A是的信息素加州红标-由(+)-(R)-柠檬烯(4)分14步合成。关键步骤是还原性维生素B 12催化(R)-5-(2-碘乙基)-6-甲基庚-6-烯-2-酮乙缩醛(8)和巴豆酸甲酯(3)的偶联。