behaves as a silent antagonist at rD2 receptors while activating h5-HT1A receptors with an efficacy at least equivalent to that of the prototypical 5-HT1A agonist (+/-)-8-OH-DPAT. These dual actions confer a unique pharmacological profile to the product. In a behavioral model predictive of positive symptoms, 16 has an activity comparable to that of the typical antipsychotic haloperidol, while it is devoid
Ruthenium-Catalyzed Regioselective 1,3-Methylene Transfer by Cleavage of Two Adjacent σ-Carbon−Carbon Bonds: An Easy and Selective Synthesis of Highly Subsituted Benzenes
作者:Jian-Jou Lian、Arjan Odedra、Chang-Jung Wu、Rai-Shung Liu
DOI:10.1021/ja0504901
日期:2005.3.1
6-cycloalkylidenyl-3,5-dien-1-ynes, which produces highly substitutedbenzenes with considerable structural reorganization. In this process, we observe a regioselective 1,3-methylene migration via extrusion from a cycloalkylidenyl ring, in addition to a regiocontrolled 1,2-alkyl migration. This cyclization provides an easy and convenient synthesis of complex benzenes bearing various different substituents.
Site-Selective C–H Alkylation of Diazine <i>N</i>-Oxides Enabled by Phosphonium Ylides
作者:Prithwish Ghosh、Na Yeon Kwon、Sangil Han、Saegun Kim、Sang Hoon Han、Neeraj Kumar Mishra、Young Hoon Jung、Sang J. Chung、In Su Kim
DOI:10.1021/acs.orglett.9b02365
日期:2019.8.16
The synthesis of alkylated diazine derivatives is important for their practical utilization as pharmaceuticals and for other purposes. Herein, we describe the metal-free site-selectiveC–H alkylation of diazine N-oxides using phosphonium ylides that affords a variety of alkylated diazine derivatives with broad functional group tolerance. The utility of this method is showcased by the late-stage functionalization
申请人:Research & Business Foundation SUNGKYUNKWAN UNIVERSITY 성균관대학교산학협력단(220050013604) BRN ▼101-82-12009
公开号:KR102231872B1
公开(公告)日:2021-03-26
본 발명은 디아진-N-옥사이드(Diazine- N -Oxides)의 위치선택적 C-H 알킬화(alkylation) 방법에 관한 것으로서, 본 발명에 따르면 의약품 내 핵심 단위구조로 알려져 있는 디아진 화합물에 알킬기를 위치선택적으로 도입하여 다수의 디아진(피라진, 피리미딘, 피리다진 등) 화합물을 알킬화 할 수 있고, 특히 흡연 치료제로 시판되고 있는 바레니클린(varenicline)의 신규 유도체 합성 및 천연물인 패니바실린(paenibacillin) A의 합성도 가능한바, 의약품을 포함하는 다양한 디아진 화합물을 합성하는 데 있어 매우 유용할 것으로 기대된다.
group) by the orgnometallic base. Even lower yields of the corresponding phosphinemethylenes were obtained when methyl- or ethyllithium are used. (β-Bromoethyl)triphenylphosphonium bromide and ethylene-1,2-bis(triphenylphosphonium) dibromide served well in the in situ generation of the vinylphosphonium salt in such reactions. Similar addition of phenyllithium to 1-propenyltriphenylphosphonium bromide
上vinyltriphenylphosnium溴化物phenylithium的作用在形成(C导致两者6 ħ 5)3 P +C-HCH 2 C ^ 6 ħ 5(CA 0.45%)和质子抽象(部分来自乙烯基的α质子),由Orgnometallic基地提供。当使用甲基或乙基锂时,获得甚至更低的相应膦亚甲基收率。(β-溴乙基)三苯基phosph溴化物和乙烯-1,2-双(三苯基phosph)二溴化物就地效果很好在这种反应中生成乙烯基phosph盐。还实现了将苯基锂类似地添加到溴化1-丙烯基三苯基phosph和溴化(1-甲基-1-丙烯基)三苯基phosph中,但是由于复杂的副反应,收率非常低。有机锂试剂isopropenyltriphenylphosphonium溴化,得到(C 6 H ^ 5)3 P +C-(CH 3)CH 2中的R,产量高。值得注意的是,观察到三苯基膦亚甲基加到溴化异丙烯基三苯乙phosph上。