New, Chiral Phase Transfer Catalysts for Effecting Asymmetric Conjugate Additions of α-Alkyl-α-cyanoacetates to Acetylenic Esters
作者:Xisheng Wang、Masanori Kitamura、Keiji Maruoka
DOI:10.1021/ja068119g
日期:2007.2.1
A new, chiral phasetransfercatalyst has been designed for the development of a general and useful procedure on the hitherto unknown, asymmetric conjugate additions of α-substituted-α-cyanoacetates to acetylenic esters with high enantioselectivity and moderate E/Z selectivity.
Nickel-Catalyzed Deaminative Cyanation: Nitriles and One-Carbon Homologation from Alkyl Amines
作者:Jianyu Xu、J. Cameron Twitty、Mary P. Watson
DOI:10.1021/acs.orglett.1c01959
日期:2021.8.20
pyridinium salts has been developed. When it is coupled with formation of the pyridinium salt from primary amines, this method enables alkyl amines to be converted to alkyl nitriles. A less toxic cyanide reagent, Zn(CN)2, is utilized, and diverse functional groups and heterocycles are tolerated. The method also enables a one-carbon homologation of alkyl amines via reduction of the nitrile products,
Iminium carbonic acid derivative salts.<b>VIII</b>. Electrophilic reactions of 2-methylthio-5,6-dihydro-1,3-thiazinium iodides, 2-methylthio-5,6-dihydrothiazolium iodides and 5-methyl-2-methylthiothiazolium iodides. Part<b>II</b>. With active methylene compounds
作者:Wolfgang Hanefeld、Helge Harms
DOI:10.1002/jhet.5570340538
日期:1997.9
The title compounds 1a-c and 2 werre reacted with several doubly activated methylene components to yield the cyclic ketene S,N-acetals 3-10.
[EN] PYRIMIDINE DERIVATIVES USEFUL AS PESTICIDES<br/>[FR] DERIVES DE PYRIMIDINE UTILES COMME PESTICIDES
申请人:CIBA-GEIGY AG
公开号:WO1994020490A1
公开(公告)日:1994-09-15
(EN) Compounds of formula (I) in which the substituent A is in the $g(b) or $g(g)-position, and in which: X is OR10, SR10 or N(R11)R12; Y is a group -CH(R13)-, oxygen, sulfur or a group -N(R14)-; n is 1 or 2; and in which R1 to R14 are as defined herein, both in the free form and in salt form. Such compounds can be used as agrochemical active compounds for pest control.(FR) Composés de la formule (I), dans laquelle le substituant A se trouve en position $g(b) ou $g(g), et dans laquelle X représente OR10, SR10 ou N(R11)R12; Y représente un groupe -CH(R13)-, oxygène, soufre ou un groupe -N(R14)-; n vaut 1 ou 2; et R1 à R14 ont les notations ci-définies, à la fois sous forme libre et sous forme de sel. Ces composés sont utilisables comme composés agrochimiques actifs dans la lutte contre les parasites.