A novel and efficient iron-catalyzed cycloaddition reaction using readily available 2,3-diaryl-2H-azirines and primary amides is reported. A wide range of trisubstituted oxazoles could be achieved in good yields with good functional group compatibility. In this transformation, two C–N bonds were cleaed and new C–N and C–O bonds were formed.
Preparation of Substituted Oxazoles by Ritter Reactions of α-Oxo Tosylates
作者:Mark Taylor、Ping-Shan Lai
DOI:10.1055/s-0029-1218682
日期:2010.5
The Lewis acid catalyzed Ritter reaction of α-oxo tosylates with nitriles forms the basis of an efficient synthesis of oxazoles. Oxazoles with various substituents can be readily prepared from inexpensive starting materials. heterocycles - cyclizations - nitriles - carbocations - oxazoles - Ritter reaction
divergent approach to indoles and oxazoles from enamides has been developed. The picolinamide-derived enamides undergo the intramolecular aromatic C–H amination in the presence of a Cu(OPiv)2 catalyst and an MnO2 oxidant to form the corresponding indoles in good yields. On the other hand, simpler aryl- or alkyl-substituted enamides are converted to the 2,4,5-trisubstituted oxazole frameworks via vinylic C–H
The invention relates to the use of compounds of general structure (I) in modulation of the Wnt pathway [Formula should be inserted here] wherein R1, R2, R3, R4 and R5 are each, independently, H or an alkyl group; D is selected from the group consisting of H, halogen, alkyl, cycloalkyl, aryl, and dialkylamino, each (other than H and halogen) being optionally substituted; Ar is an aryl or heteroaryl group, optionally substituted; Cy is an aryl, heteroaryl or a saturated ring containing at least one heteroatom, each being optionally substituted; and n is an integer from 1 to 3.
本发明涉及一般结构(I)化合物在调节 Wnt 通路中的用途[此处应插入式子] 其中 R1、R2、R3、R4 和 R5 各自独立地为 H 或烷基; D 选自 H、卤素、烷基、环烷基、芳基和二烷基氨基组成的组,每种基团(H 和卤素除外)均被任选取代;Ar 是芳基或杂芳基,任选被取代;Cy 是芳基、杂芳基或含有至少一个杂原子的饱和环,每种基团均被任选取代;以及 n 是 1 至 3 的整数。
Purine Diones As Wnt Pathway Modulators
申请人:Agency for Science, Technology and Research
公开号:US20170334912A1
公开(公告)日:2017-11-23
The invention relates to the use of compounds of general structure (I) in modulation of the Wnt pathway [Formula should be inserted here] wherein R
1
, R
2
, R
3
, R
4
and R
5
are each, independently, H or an alkyl group; D is selected from the group consisting of H, halogen, alkyl, cycloalkyl, aryl, and dialkylamino, each (other than H and halogen) being optionally substituted; Ar is an aryl or heteroaryl group, optionally substituted; Cy is an aryl, heteroaryl or a saturated ring containing at least one heteroatom, each being optionally substituted; and n is an integer from 1 to 3.