Photocatalytic Alkylation of Pyrroles and Indoles with α-Diazo Esters
作者:Łukasz W. Ciszewski、Jakub Durka、Dorota Gryko
DOI:10.1021/acs.orglett.9b02612
日期:2019.9.6
electron-rich aromatic compounds with diazo esters. C-2-alkylated indoles and pyrroles are obtained with good yields even though the photocatalyst loading is as low as 0.075 mol %. For EWG-substituted substrates, the addition of a catalytic amount of N,N-dimethyl-4-methoxyaniline is required. Both EWG-EWG- and EWG-EDG-substituted diazo esters are suitable as alkylatingagents. The reaction selectivity and mechanistic
Synthesis of α-amino acids by addition of putative azido radicals to α-methoxy acrylonitriles derived from aldehydes and ketones
作者:Derrick L.J. Clive、Nola Etkin
DOI:10.1016/s0040-4039(00)77143-7
日期:1994.4
α-Methoxy acrylonitriles, available from aldehydes and ketones, react with sodium azide in the presence of ceric ammonium nitrate to give azido nitrates; from these compounds, α-amino acids are obtained by sequential treatment with sodium acetate in acetic acid and then methanolic potassium carbonate, followed by hydrogenation.
Acceptor, donor, and captodative stabilization in transition states of 5-hexen-1-yl radical cyclizations
作者:Seung Un. Park、Sung Kee. Chung、Martin. Newcomb
DOI:10.1021/ja00262a009
日期:1986.1
Constantes de vitesse et parametres d'activation de la cyclisation des radicaux hexene-5yles et de leurs derives substitues en 6 par un groupe cyano, un groupe methoxy et un groupe cyano et un groupe methoxy
Constantes de vitesse et parametres d'activation de la cyclisation des radicaux hexene-5yles et de leurs衍生替代物 en 6 par un groupe cyano, un groupe methoxy et un groupe cyano et un groupe methoxy
[EN] ESTER COMPOUND AND USE THEREOF<br/>[FR] COMPOSÉ ESTER ET SON UTILISATION
申请人:SUMITOMO CHEMICAL CO
公开号:WO2013027864A1
公开(公告)日:2013-02-28
An ester compound represented by formula (1): wherein Q represents N(CH2C≡CH)-CH2-C*(=O) or N(CH2C≡CH)-C(CH3)=N* (where, * represents a binding position with N atom being adjacent to a carbonyl group); R3 represents a C1-C4 alkyl group; and a relative configuration between the substituent at the 1-position of the cyclopropane ring and the substituent at the 3-position of the cyclopropane ring is a trans configuration, has an excellent pest control effect.
Mechanistic studies on the base-promoted addition of lithiopinacolonate to several aromatic carbonyl compounds in nonhydroxylic solvents
作者:Carrie A. Palmer、Craig A. Ogle、Edward M. Arnett
DOI:10.1021/ja00040a022
日期:1992.7
An investigation of the reaction of lithium enolates with carbonyl compounds is continued by determining kinetic data for the aldol reaction of lithiopinacolonate with o- and p-methylbenzaldehyde in methylcyclohexane-d 14 at-80 o C using rapid injection proton NMR spectroscopy. The data were fit to a second-order reaction model with half-lives of 43.2 and 12.7 s, respectively. The NMR spectra as a