An unusual tandem cyclization—Stevens rearrangement mediated by Ph3P/DEAD or Bu3P/ADDP
作者:Michael A. Walker
DOI:10.1016/0040-4039(96)01891-6
日期:1996.11
treated with Ph3P/DEAD or Bu3P/ADDP1 yield products resulting from intramolecular cyclization to form five- and six-membered, cyclic quaternary ammonium salts (respectively) which undergo a Stevensrearrangement in the same pot.
当用Ph 3 P / DEAD或Bu 3 P / ADDP 1处理醇1和10c时,由于分子内环化形成五元和六元环状季铵盐(分别)而产生的产物在同一锅中进行了史蒂文斯重排。
Facile synthesis of maleimide bifunctional linkers
作者:H.Dalton King、Gene M Dubowchik、Michael A Walker
DOI:10.1016/s0040-4039(02)00192-2
日期:2002.3
The synthesis of maleimide containing derivatives capable of serving as linkers for the conjugation of proteins is described. These compounds differ from previously reported linkers by having multiple sites available for drug attachment. Compounds 3a, 3b, and 3d were synthesized from the corresponding amino alcohols by the addition of two equivalents of t-butyl bromoacetate to a series of amino alcohols