n-Bu<sub>4</sub>NI-catalyzed selective dual amination of sp<sup>3</sup> C–H bonds: oxidative domino synthesis of imidazo[1,5-c]quinazolines on a gram-scale
作者:Dan Zhao、Teng Wang、Qi Shen、Jian-Xin Li
DOI:10.1039/c4cc01444h
日期:——
An n-Bu4NI catalyzed domino reaction that involves selective dual amination of sp(3) C-Hbonds has been developed. The protocol affords a facile and efficient approach to the synthesis of imidazo[1,5-c]quinazolines under mild conditions.
Pd(0)-catalyzed benzylic arylation–oxidation of 4-methylquinazolines via sp3 C–H activation under air conditions
作者:Dan Zhao、Min-Xue Zhu、Yue Wang、Qi Shen、Jian-Xin Li
DOI:10.1039/c3ob41488d
日期:——
An efficient and selective Pd(0)-catalyzed sp3 CâH bond arylationâoxidation of 4-methylquinazolines is reported. The method enables the introduction of arylketone at the benzylic position of 4-methylquinazolines without the use of an additional directing group, and atmospheric oxygen is used as the sole oxidant.
1-(N-phenylaminoalkyl)piperazine derivatives substituted at position 2 of the phenyl ring
申请人:Recordati S.A. Chemical and Pharmaceutical Company
公开号:US06399614B1
公开(公告)日:2002-06-04
The present invention is directed to novel 1-(N-phenylaminoalkyl)piperazine derivatives substituted at the position 2 of the phenyl ring. Pharmaceutical compositions comprising the compounds of the invention also are contemplated. The compounds of the present invention also are contemplated for use in treating neuromuscular dysfunction of the lower urinary tract in a mammal.
Ruthenium(II) Catalyzed Regiospecific C–H/O–H Annulations of Directing Arenes via Weak Coordination
作者:Arghya Banerjee、Sourav Kumar Santra、Prakash Ranjan Mohanta、Bhisma K. Patel
DOI:10.1021/acs.orglett.5b02967
日期:2015.11.20
Ruthenium(II) catalyzed oxidative CH/OH annulations have been demonstrated using two different directing arenes viz. 2-arylquinolinone and 2-arylbenzoxazinone with internal alkynes. Regiospecific annulations have been observed for both directing arenes via the assistance of weaker carbonyl oxygen in the presence of a stronger nitrogen-directing site. In this substrate-controlled convergent protocol the weaker directing group dictates the annulation path.