Communication
ChemComm
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a,b-unsaturated amides in good yields with a good level of E/Z
stereoselectivities, which would be a worthwhile valuable comple-
ment to the existing methods. These methods turned out to be
convenient, with easily available and inexpensive aryl/alkyl halides
as starting materials. Notably, it is the first example which
shows that two molecules of diazo compounds could be used as
a C2-unit in the palladium-catalyzed olefination of aryl halides,
in which the trimethylsilyldiazomethane (TMSD)-initiated
double carbene migratory insertion was for the first time realized
in this work. In addition, it is possible that the corresponding
vinyl silanes were produced with a possible pathway involving
palladium carbene formation, migratory insertion and finally
b-syn-elimination or reductive elimination. Further investiga-
tion into the application of this protocol is currently underway
in our lab.
We thank the National Natural Science Foundation of China
(NSFC, No. 21472031, 21703051, 21702211, and 21773051), the
Natural Science Foundation of Jiangsu Province (BK20170421),
and the Zhejiang Provincial Natural Science Foundation of China
(ZJNSFC, No. LZ18B020001, LY16E030009, LY17E030003, and
LY17B030005) for financial support of this work.
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Conflicts of interest
There are no conflicts to declare.
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