Alkylradicals were easily produced from secondary or tertiary alcohols in a cheap and simple way by silver-catalyzed decarboxylation of oxalic acid monoesters by S2O8=. They were utilized for the alkylation of heteroaromatic bases in a two-phase system, with high yields and selectivity.
Acid- or base-promoted photostimulated homolytic tert-butylation of pyridines and thiophenes
作者:Byeong Hyo Kim、Insik Jeon、Tae Hee Han、Hae Jin Park、Young Moo Jun
DOI:10.1039/b104906m
日期:——
Regioselective photostimulated homolytic tert-butylations for heteroaromatics such as pyridines or thiophenes are investigated with tert-butylmercury(II) chloride in the presence of toluene-p-sulfonic acid (PTSA) or 1,4-diazabicyclo[2.2.2]octane (DABCO) respectively. While the promotion effect of acid is quite strong for basic pyridines, the acid does not promote the reaction effectively for non-basic
Radical generation enabled by photoinduced N–O bond fragmentation
作者:Edward J. McClain、Alan K. Wortman、Corey R. J. Stephenson
DOI:10.1039/d2sc02953g
日期:——
Recent advances in synthetic chemistry have seen a resurgence in the development of methods for visible light-mediated radical generation. Herein, we report the development of a photoactive ester based on a quinoline N-oxide core structure, that provides a strong oxidant in its excited state. The heteroaromatic N-oxide provides access to primary, secondary, and tertiary radical intermediates, and its
Substituted pyrazolo[3,4-d]pyrimidines as Wee1 inhibitors
申请人:NUVATION BIO INC.
公开号:US11332473B2
公开(公告)日:2022-05-17
This invention provides for substituted pyrazolo[3,4-d]pyrimidine compounds of the Formula (I):
as Wee1 inhibitors. The substituted pyrazolo[3,4-d]pyrimidine compounds may find use as therapeutic agents for the treatment of diseases. The substituted pyrazolo[3,4-d]pyrimidine compounds may also find particular use in oncology.