Allyl esters of 3-carboxylcoumarins undergo facile decarboxylative coupling at just 25−50 °C. This represents the first extension of decarboxylative C−C bond-forming reactions to the coupling of aromatics with sp3-hybridized electrophiles. Finally, the same concept can be applied to the sp2−sp3 couplings of pyrones and flavones. Thus, a variety of biologically important heteroaromatics can be readily
3-羧基香豆素的烯丙酯在 25−50 °C 下即可轻松脱羧偶联。这代表了脱羧CC键形成反应首次扩展到芳香族化合物与sp 3杂化亲电子试剂的偶联。最后,相同的概念可以应用于吡喃酮和黄酮的 sp 2 -sp 3偶联。因此,多种生物学上重要的杂芳族化合物可以很容易地官能化,而不需要更标准的交叉偶联反应通常需要的强碱或化学计量的有机金属化合物。
Aminomethylphenolic pyrazines
申请人:ICI Americas Inc.
公开号:US04910202A1
公开(公告)日:1990-03-20
This invention comprises novel pyrazine amides which are useful as eukalemic diuretics.
这项发明涵盖了一种新型的吡嗪酰胺,其可用作平衡钾的利尿剂。
Aminomethylphenolic pyrazines, their preparation and use
申请人:ICI AMERICAS INC.
公开号:EP0293170A1
公开(公告)日:1988-11-30
The invention discloses novel pyrazine amide derivatives of the formula III (set out below) which are useful as eukalemic diuretics. Also disclosed are pharmaceutical compositions containing the novel amides and processes for the manufacture of said amides.
本发明公开了新型吡嗪酰胺式 III 衍生物(如下文所述),可用作真核利尿剂。本发明还公开了含有上述新型酰胺的药物组合物以及上述酰胺的生产工艺。
Pyridinium hydrobromide perbromide induces ipsobromodeformylation in o-hydroxy and o-methoxy substituted aromatic aldehydes
作者:Rubén Córdoba、Joaquı́n Plumet
DOI:10.1016/s0040-4039(02)02387-0
日期:2002.12
The reaction of o-hydroxy and o-methoxy substituted aromatic aldehydes with PHPB in pyridine gives aromatic bromination products including those arising from ipsobromodeformylation. (C) 2002 Elsevier Science Ltd. All rights reserved.
WRIEDE, ULRICH;FERNANDEZ, MARIO;WEST, KEVIN F.;HARCOURT, DALE;MOORE, HARO+, J. ORG. CHEM., 52,(1987) N 20, 4485-4489
作者:WRIEDE, ULRICH、FERNANDEZ, MARIO、WEST, KEVIN F.、HARCOURT, DALE、MOORE, HARO+