Wittig Rearrangement of 3-Furylmethyl Ethers: Facile Synthesis of 3-Methyl-2-furylmethanols and 3-Furylethanols
作者:Masayoshi Tsubuki、Toshio Honda、Hiroyuki Okita、Kazunori Kaneko、Atsushi Shigihara
DOI:10.3987/com-08-s(f)40
日期:——
Wittig rearrangement of 3-furylmethyl ethers la-i was investigated. Deprotonation of 3-furylmethyl ethers la-i with bases, such as BuLi and LDA, occurred preferentially at the allylic, propargylic, benzylic positions and α-position adjacent to carbonyl group giving the corresponding anions, which underwent 2,3- and 1,2-rearrangements to afford 3-methyl-2-furylmethanols 2a-i and 3-furylethanols 3a-f
研究了 3-呋喃基甲基醚 la-i 的 Wittig 重排。3-呋喃基甲基醚 la-i 与碱(例如 BuLi 和 LDA)的去质子化优先发生在烯丙基、炔丙基、苄基位置和与羰基相邻的 α-位置,产生相应的阴离子,其经历 2,3- 和 1, 2-重排得到 3-甲基-2-呋喃基甲醇 2a-i 和 3-呋喃基乙醇 3a-f,h,i。采用 Wittig 重排作为关键步骤,实现了薙刀酮和树松素的合成。