描述了由天然产物激发的chromeno [3,4- b ]吡咯-4(3 H)-ones的一般,顺序和有效的一锅合成。一锅法反应序列由体现邻炔烃取代基的N-取代Boc-甘氨酸O-芳基酯的N-Boc脱保护,乙醛生成甲亚胺基叶立德,随后与炔烃分子内进行1,3-偶极环加成通过氧化芳香化。这种合成方法使人们可以高效地获得一系列高度取代的各种吡咯香豆香豆素。
One-pot synthesis of a natural product inspired pyrrolocoumarine compound collection by means of an intramolecular 1,3-dipolar cycloaddition as key step
作者:Srinivasa Rao Vidadala、Herbert Waldmann
DOI:10.1016/j.tetlet.2015.01.021
日期:2015.6
A general, sequential and efficient one-pot synthesis of natural product inspired chromeno[3,4-b]pyrrol-4(3H)-ones is described. The one-pot reaction sequence consists of N-Boc deprotection of a N-substituted Boc-glycine O-aryl ester embodying an ortho-alkyne substituent, azomethine ylide generation with an aldehyde, subsequent intramolecular 1,3-dipolarcycloaddition with the alkyne followed by oxidative
描述了由天然产物激发的chromeno [3,4- b ]吡咯-4(3 H)-ones的一般,顺序和有效的一锅合成。一锅法反应序列由体现邻炔烃取代基的N-取代Boc-甘氨酸O-芳基酯的N-Boc脱保护,乙醛生成甲亚胺基叶立德,随后与炔烃分子内进行1,3-偶极环加成通过氧化芳香化。这种合成方法使人们可以高效地获得一系列高度取代的各种吡咯香豆香豆素。
Chemical Genetics Reveals a Role of dCTP Pyrophosphatase 1 in Wnt Signaling
inhibitor of canonical Wntsignaling. Target identification and validation revealed that Pyrcoumin is a competitive inhibitor of dCTPpyrophosphatase1 (dCTPP1). We demonstrate a yet unknown interaction of dCTPP1 with ubiquitin carboxyl-terminal hydrolase (USP7) that is counteracted by dCTPP1 inhibitors. These findings indicate that dCTPP1 plays a role in regulation of Wnt/β-catenin signaling most likely through