[2+2+2]-Cycloaddition of 4-Hydroxy-Substituted Enediynes to 2-Hydroxy-Substituted Decahydrophenanthrenes
作者:Ulrich Groth、Norbert Richter、Aris Kalogerakis
DOI:10.1002/ejoc.200300432
日期:2003.12
Enediynes rac-4 were prepared in seven steps with an overall yield of 31% starting from 4-pentyn-1-ol (5). A cobalt mediated [2+2+2]-cycloaddition of these enediynes and subsequent removal of the metal fragment afforded the decahydrophenanthrenes rac-3/13 in 37−56% yield. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
从 4-戊炔-1-醇 (5) 开始,分七步制备烯二炔 rac-4,总产率为 31%。钴介导的这些烯二炔的 [2+2+2]-环加成和随后去除金属碎片以 37-56% 的产率提供了十氢菲 rac-3/13。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)