描述了21 2和3-取代的奎宁环烷和一些季铵衍生物的合成和心脏电生理作用。通过2-亚甲基-3-奎宁环酮的烷基化制备2-取代的奎宁环烷2-8。与3-奎宁环酮的Wittig反应得到3-取代的衍生物9,其随后转化为10和11。化合物的电生理特性在犬心脏浦肯野纤维和心室肌条中测定。3-[(取代的苯基)烷基]喹核苷选择性地增加了动作电位的持续时间(Vaughan Williams III类活性)。在2-取代的系列中,某些化合物既增加了动作电位的持续时间,又降低了传导速度(I类活性)。对于某些2-取代的奎宁环烷,苯环的适当取代被证明是重要的III类电生理活性的必要条件。所选化合物在麻醉狗的程序化电刺激模型中有效。
In Situ Generation of Phosphoryl Alkylindiums and Their Synthetic Application to Arylalkyl Phosphonates via Palladium-Catalyzed Cross-Coupling Reactions
摘要:
Phosphoryl alkylindium reagents are generated in situ from the direct insertion of indium with bromoalkyl phosphonates in the presence of CuCl, and their synthetic application to arylalkyl phosphonates is reported via a Pd-catalyzed cross-coupling reaction with tolerance of a diversity of functional groups including ester, ketone, aldehyde, nitrile, nitro, trifluoromethyl, chloride, methoxy, hydroxy, and amino.
Quinuclidines and quinuclidinium salts as antiarrhythmic agents
申请人:Schering A.G.
公开号:US04599344A1
公开(公告)日:1986-07-08
Novel quinuclidines, their acid addition, quaternary ammonium and inner salts are described. Also provided is the method of using these compounds as antiarrhythmic agents and pharmaceutical formulations containing such compounds.
Transition metal-free access to 3,4-dihydro-1,2-oxaphosphinine-2-oxides from phosphonochloridates and chalcones through tandem Michael addition and nucleophilic substitution
A novel and transition metal-free synthesis of 3,4-dihydro-1,2-oxaphosphinine 2-oxides was developed. LiHMDS-mediated tandem Michael addition and nucleophilicsubstitution of readily available phosphonochloridates and chalcones afforded a variety of valuable 3,4-dihydro-1,2-oxaphosphinine 2-oxides bearing diverse functionalities in excellent yields and satisfactory to good diastereoselectivity (up
A resinous composition, having excellent toughness, flexibility, heat resistance and moldability, comprises (A) from 5 to 98% by weight of a polyamide and (B) from 95 to 2% by weight of a polyolefin modified with from 0.001 to 10% by mole based on all polymer components of component having at least one functional group selected from the groups represented by the following general formulas (1), (II) and (III);
wherein R1 denotes an organic group and R2, R3, R4 and R5 denote a group selected from the groups consisting of hydrogen atom and organic group respectively.