Highly regioselective synthesis of N-acyl-2,3-dihydropyrrole or N-sulfonyl-2,3-dihydropyrrole derivatives by nano-palladium catalyzed cycloisomerization of 1,6-dienes
作者:Lizhe Feng、Zhiyong Gan、Xiaopeng Nie、Peipei Sun、Jianchun Bao
DOI:10.1016/j.catcom.2009.12.018
日期:2010.2
Porous palladium nanoparticles were prepared using a solution-phase approach. Their structures and shapes were analyzed by XRD, EDS, TEM and HRTEM. These palladium nanoparticles were used to catalyze the cycloisomerization reaction of N,N-diallylamide or N,N-diallylsulfonamide, and N-acyl-23-dihydropyrrole or N-sulfonyl-2,3-dihydropyrrole derivatives were therefore synthesized with very high regioselectivity, and in good yields. The nano-palladium catalyst showed high efficiency and it can be reused several times. A hydropalladation mechanism was proposed for this reaction. (C) 2009 Published by Elsevier B.V.
FORMULATIONS
申请人:Bell Gordon Alistair
公开号:US20120184438A1
公开(公告)日:2012-07-19
This invention relates to agrochemical compositions comprising a benzamide compound of formula (I) where R
1
is fluoro, methoxy or C
1-4
alkyl; R
2
and R
3
are each independently optionally substituted C
1-6
alkyl or optionally substituted C
2-6
alkenyl; or R
3
is hydrogen and R
3
is optionally substituted C
5-8
alkyl or optionally substituted C
4-6
alkenyl or optionally substituted benzyl; or R
2
and R
3
and the nitrogen atom to which they are both attached together form an optionally substituted 5-, 6- or 7-membered ring, which ring optionally contains at least one further heteroatom selected from O, N and S; to the use of those benzamide compounds as solvents; to certain novel compounds of formula (I); and to a process for preparing those novel compounds.
[EN] FORMULATIONS<br/>[FR] FORMULATIONS
申请人:SYNGENTA LTD
公开号:WO2011010082A2
公开(公告)日:2011-01-27
This invention relates to agrochemical compositions comprising a benzamide compound of formula (I) where R1 is fluoro, methoxy or C1-4 alkyl; R2 and R3 are each independently optionally substituted C1-6 alkyl or optionally substituted C2-6 alkenyl; or R3 is hydrogen and R3 is optionally substituted C5-8 alkyl or optionally substituted C4-6 alkenyl or optionally substituted benzyl; or R2 and R3 and the nitrogen atom to which they are both attached together form an optionally substituted 5-, 6- or 7-membered ring, which ring optionally contains at least one further heteroatom selected from O, N and S; to the use of those benzamide compounds as solvents; to certain novel compounds of formula (I); and to a process for preparing those novel compounds.
Synthesis of N-Sulfonyl- and N-Acylpyrroles via a Ring-Closing Metathesis/Dehydrogenation Tandem Reaction
N-acylpyrroles were synthesized via olefin ring-closingmetathesis of diallylamines and in situ oxidative aromatization in the presence of the ruthenium Grubbs catalyst and a suitable copper catalyst. In the presence of Cu(OTf)2 and CuBr2, the reaction afforded N-sulfonyl- and N-acylpyrroles, respectively, in one pot. Under an oxygen atmosphere, the reaction went smoothly without the need of hydroperoxide