Catalytic Alkene Carboaminations Enabled by Oxidative Proton-Coupled Electron Transfer
作者:Gilbert J. Choi、Robert R. Knowles
DOI:10.1021/jacs.5b05377
日期:2015.7.29
N-arylamides (bond dissociation freeenergies ∼ 100 kcal/mol) via concerted proton-coupled electron transfer (PCET) and mediating efficient carboamination reactions of the resulting amidyl radicals. This manner of PCET activation, which finds its basis in numerous biological redox processes, enables the formal homolysis of a stronger amide N-H bond in the presence of weaker allylic C-H bonds, a selectivity that
Process for the preparation of aryl substituted aldehydes, ketones and
申请人:Givaudan Corporation
公开号:US04070374A1
公开(公告)日:1978-01-24
Upon reacting an alcohol having an olefinic double bond with an aryl bromide or iodide in the presence of a Paladium catalyst, there is provided either an aryl substituted aldehyde, ketone or olefinic alcohol.
the zeolites and reacted with alkenes. For all the substrates studied, the ene-type allylic hydroperoxides were obtained in a highly regioselective manner. The regiochemistry for 1−4 in favor of the allylic hydrogen abstraction from the largest substituents is in contrast to their photooxidation within the dye-supported zeolite Na−Y, where the secondary hydroperoxides are preferentially produced. The
Complex Allylation by the Direct Cross-Coupling of Imines with Unactivated Allylic Alcohols
作者:Masayuki Takahashi、Martin McLaughlin、Glenn C. Micalizio
DOI:10.1002/anie.200900236
日期:2009.5.4
stereoselective: The convergent coupling of allylic alcohols with imines to deliver stereodefined homoallylic amines is described (see scheme). The process proceeds with net allylic transposition without the intermediacy of allylic organometallic reagents. Two stereodefined centers and a geometrically defined di‐ or trisubstitutedalkene are forged with high selectivity.
Method for producing anellated tetrahydro-{1h}-triazoles
申请人:——
公开号:US20040097728A1
公开(公告)日:2004-05-20
The present invention relates to a process for preparing fused tetrahydro-[
1
H]-triazoles of the formula I
1
where the variables R
a
, Z, Z
1
, X, W, n and Q are as defined in claim 1, by cyclization of compounds of the formula II
2
where R is C(X)OR
2
or C(X)SR
2
, where X is oxygen or sulfur, and R
2
is as defined in claim 1, in the presence of a base.
The invention also relates to compounds of the formula I where W is sulfur if Z is a methylene group optionally substituted by R
a
, and furthermore to compounds of the formula I where Q is a benzoxazole or benzothiazole radical, and to the use of these compounds as herbicides.