A method for the catalytic α-arylation of indolin-3-ones was developed. The catalytic system comprising Pd(dba)2 and PAd3 was found to be optimal for the transformation. The protocol features broad functional group compatibility in that a range of arylated indoxyl derivatives bearing a fully substituted carbon center was synthesized with high efficiency. A preliminary bioassay study revealed that the
N‐Heterocycliccarbene‐catalyzed reactions of indolin‐3‐ones with 2‐bromoenals opened an asymmetric access to 3,4‐dihydropyrano[3,2‐b]indol‐2(5 H)‐ones in good yields and with good to excellent enantioselectivities. This protocol tolerates a broad substrate scope. In addition, a possible mechanism for the annulation reaction is presented.
Indoxyl-based umpolung strategy for the synthesis of unsymmetrical 3,3′-biindoles
作者:Jing Guo、Jiang Weng、Gong-Bin Huang、Lin-Jie Huang、Albert S.C. Chan、Gui Lu
DOI:10.1016/j.tetlet.2016.10.099
日期:2016.12
3,3′-Bisindoles are known to be important structural motifs found in bioactive natural products, pharmaceuticals, and functional materials. Herein, a novel indoxyl-based approach was established for the synthesis of unsymmetrical 3,3′-biindoles from indoles and indoxyls. This approach generated moderate to excellent yields of the desired products (24 examples, up to 98% yield). The present method features
This invention relates to compounds of the formula
wherein R
1
to R
9
are as described below, or to pharmaceutically acceptable salts thereof. These compounds are BACE2 inhibitors and can be used as medicaments for the therapeutic and/or prophylactic treatment of diseases such as diabetes, particularly type 2 diabetes, and other metabolic disorders.
domino Michael/ Henryreaction of 1-acetylindolin-3-ones with o-formyl-(E)-β-nitrostyrenes catalyzed by low loading of a quinine-derived amine-squaramide provides the corresponding indolin-3-one derivatives bearing four adjacent stereogenic centers in good to high yields and with excellent stereoselectivities. A highly diastereo- and enantioselective domino Michael/ Henryreaction of 1-acetylindolin-3-ones
摘要 1-乙酰吲哚啉-3-酮与邻甲酰基-( E )-β-硝基苯乙烯在低负载奎宁衍生的胺-方酰胺催化下的高度非对映和对映选择性多米诺迈克尔/亨利反应提供相应的吲哚啉-3-一种具有四个相邻立体中心的衍生物,产率好到高,并具有出色的立体选择性。 1-乙酰吲哚啉-3-酮与邻甲酰基-( E )-β-硝基苯乙烯在低负载奎宁衍生的胺-方酰胺催化下的高度非对映和对映选择性多米诺迈克尔/亨利反应提供相应的吲哚啉-3-一种具有四个相邻立体中心的衍生物,产率好到高,并具有出色的立体选择性。