Enantioselective and Regiodivergent Functionalization of<i>N-</i>Allylcarbamates by Mechanistically Divergent Multicatalysis
作者:Edward Richmond、Ismat Ullah Khan、Joseph Moran
DOI:10.1002/chem.201602792
日期:2016.8.22
A pair of mechanistically divergent multicatalytic reaction sequences has been developed consisting of nickel‐catalyzed isomerization of N‐allylcarbamates and subsequent phosphoric‐acid‐catalyzed enantioselective functionalization of the resulting intermediates. By appropriate selection of reaction partners, in situ generated imines and ene‐carbamates are mechanistically partitioned to yield opposing
Iridium-Catalyzed Asymmetric Allylic Substitutions with Bulky Amines/Oxidative Double Bond Cleavage - Entry into the Reetz Synthesis of Amino Alcohols
作者:Kai Seehafer、Chandi C. Malakar、Markus Bender、Jianping Qu、Chen Liang、Günter Helmchen
DOI:10.1002/ejoc.201501333
日期:2016.1
Branched allylic amines were prepared by Ir-catalyzed enantioselective allylic aminations with the bulky N-nucleophiles HN(Boc)2 and HNBn2. The products were transformed into N-protected amino aldehydes, which were either reduced or coupled diastereoselectively with organometallic compounds to give vicinal aminoalcohols. A formal synthesis of the neurokinin receptor antagonist (+)-L-733060 was carried
支链烯丙胺是通过 Ir 催化的对映选择性烯丙胺与庞大的 N-亲核试剂 HN(Boc)2 和 HNBn2 制备的。将产物转化为 N 保护的氨基醛,它们与有机金属化合物非对映选择性地还原或偶联,得到邻氨基醇。作为应用程序进行了神经激肽受体拮抗剂 (+)-L-733060 的正式合成。
A New Convenient Method for the Preparation of Enamides from<i>N</i>-Allylamides
作者:Manfred Hesse、Sergey Sergeyev
DOI:10.1055/s-2002-32962
日期:——
Isomerization of various N-allylamides in the presence of Fe(CO)5 smoothly afforded the corresponding enamides in yields up to 95%. The reported procedure is compatible with various functional groups including protected amino and hydroxy groups. The possible mechanism of transformation is discussed.
Asymmetric allylic amination catalyzed by chiral ferrocenylphosphine-palladium complexes
作者:Tamio Hayashi、Kohei Kishi、Akihiro Yamamoto、Yoshihiko Ito
DOI:10.1016/s0040-4039(00)88870-x
日期:1990.1
A palladiumcomplex bearing chiral (hydroxyalkyl)ferrocenylphosphine ligand was found to be a highly regio-and stereoselective catalyst for the asymmetric allylic amination of 2-butenyl acetates with benzylamine, the nucleophilicattack of the amine taking place selectively on the more substituted end of the π-allylpalladium intermediate to give optically active 3-benzyamino- 1-butene of up to 84%