作者:B. Kim、Chang-Eun Yeom、Mi Kim、Whail Choi
DOI:10.1055/s-2008-1032078
日期:——
Acetylenic trimethylsilyl (TMS) groups were efficiently removed using 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). With either 1.0 or even 0.1 equivalents of DBU, smooth desilylation of various terminal acetylenic TMS groups was accomplished selectively in the presence of alkyl silyl ethers and other base-labile groups. Furthermore, more sterically hindered terminal acetylenic silyl groups such as TBDMS and TIPS remained intact under these conditions.
使用 1,8-二氮杂双环[5.4.0]十一-7-烯(DBU)可以有效地去除乙炔基三甲基硅烷(TMS)基团。使用 1.0 或甚至 0.1 等效的 DBU,在烷基硅基醚和其他碱不敏感基团存在的情况下,各种末端乙炔基 TMS 基团都能选择性地顺利脱甲基。此外,在这些条件下,TBDMS 和 TIPS 等立体受阻的末端乙炔基硅烷基团仍然保持完好无损。