Practical Stereoselective Synthesis of C3‐Spirooxindole‐ and C2‐Spiropseudoindoxyl‐Pyrrolidines
<i>via</i>
Organocatalyzed Pictet‐Spengler Reaction/Oxidative Rearrangement Sequence
作者:Masaru Kondo、Naoki Matsuyama、Tin Z. Aye、Irshad Mattan、Tomoyuki Sato、Yoshinori Makita、Masami Ishibashi、Midori A. Arai、Shinobu Takizawa、Hiroaki Sasai
DOI:10.1002/adsc.202001472
日期:2021.5.18
A stereoselective synthetic route to chiral C3-spirooxindole- and C2-spiropseudoindoxyl-pyrrolidines was accomplished by an enantioselective organocatalyzed Pictet-Spengler reaction of tryptamines and isotryptamines followed by a diastereoselective oxidative rearrangement using eco-friendly oxidants (i. e., NaOCl ⋅ 5H2O and Oxone®). This sequential reaction enables rapid access to chiral C3-spirooxindole-
手性C3-spirooxindole-和C2-spiropseudoindoxyl-吡咯烷甲立体选择性合成途径是通过对映体选择性实现organocatalyzed色胺的Pictet-Spengler反应和使用环保氧化剂(即isotryptamines后跟一个非对映选择性氧化重排。,次氯酸钠⋅5H 2 O和Oxone®)。该顺序反应使您可以通过一锅法快速获得手性C3-spirooxindole-和C2-spiropseudoindindoxyl-吡咯烷。制备的对映体富集的螺化合物的Wnt信号抑制分析表明,它们表现出中等活性。