Total Synthesis of 10-Isocyano-4-cadinene and Its Stereoisomers and Evaluations of Antifouling Activities
作者:Keisuke Nishikawa、Hiroshi Nakahara、Yousuke Shirokura、Yasuyuki Nogata、Erina Yoshimura、Taiki Umezawa、Tatsufumi Okino、Fuyuhiko Matsuda
DOI:10.1021/jo2008109
日期:2011.8.19
The first enantioselective total synthesis of 10-isocyano-4-cadinene, a marine sesquiterpene isolated from nudibranchs of the family Phyllidiidae, and determination of its absolute stereochemistry were achieved. 10-Isocyano-4-cadinene is expected to be a novel nontoxic antifouling agent. In the synthesis, intermolecular Diels–Alder reaction and samarium diiodide induced Barbier-type cyclization were
10异氰基-4-杜松烯,海洋倍半萜来自家庭的海蛞蝓分离的对映选择性第一全合成Phyllidiidae,其绝对立体化学的确定得以实现。10-异氰基-4-cadinene有望成为一种新型的无毒防污剂。在合成过程中,分子间Diels–Alder反应和二碘化induced诱导的Barbier型环化被用作关键步骤。通过比较天然样品和合成样品之间的旋光度,将10-异氰基-4-cadinene的绝对构型确定为(1 S,6 S,7 R,10 S)。此外,作者成功地合成了10- epi-和di-1,6- epi-10-异氰基-4-cadinene通过相同的合成途径。还评估了对带有茄碱的Balanus amphitrite的防污活性。