A new synthesis of vitamin K viaπ-allyinickel intermediates
作者:Kikumasa Sato、Seiichi Inoue、Kenji Saito
DOI:10.1039/p19730002289
日期:——
A newsynthesis of vitamins K1(1), and K2(5n)(2) is described. Reaction of bis-(1–3-η-3-alkylbut-2-enyl)di-µ-bromodinickel complexes (8a–c) with 2-bromo-3-methylnaphthalene-1,4-diyl bis(methoxymethyl) ether (6a) or diacetate (6b) in a polar, co-ordinating solvent gave the corresponding vitaminK derivatives (9a–d) in high yield, which were converted into vitaminK analogues also in high yield. The