Torquoselective 6π-Electron Electrocyclic Ring Closure of 1-Azatrienes Containing Acyclic Chirality at the <i>C</i>-Terminus
作者:Nadiya Sydorenko、Richard P. Hsung、Eymi L. Vera
DOI:10.1021/ol060932t
日期:2006.6.1
Torquoselective pericyclic ring closures of 1-azatrienes that contain acyclic chirality at the C-terminus are described herein.
Highly Torquoselective Electrocyclizations and Competing 1,7-Hydrogen Shifts of 1-Azatrienes with Silyl Substitution at the Allylic Carbon
作者:Zhi-Xiong Ma、Ashay Patel、K. N. Houk、Richard P. Hsung
DOI:10.1021/acs.orglett.5b00727
日期:2015.5.1
Highly torquoselective electrocyclizations of chiral 1-azatienes are described. These 1-azatrienes,Contain an allylic stereocenter that is substituted with a silyl group and are derived in situ from condensation of gamma-silyl-substituted enals with vinylogous amides. The ensuing stereoselective ring closure are part of a tandem sequence that constitutes an aza-[3 + 3] aimulation method for constructing 1,2-dihydropyridines. several mechanisms:for the formal 1,7-hydrogen 'shift of these 1-azattienes vtiere evaluated computationally.
JPH0597783A
申请人:——
公开号:JPH0597783A
公开(公告)日:1993-04-20
Cinchona Alkaloid/Ti<sup>IV</sup>-Catalyzed Enantioselective Enamine-Trifluoropyruvate Condensation-Cyclization Reaction and Its Application to Drug-like Heterocycles
design: A cinchonaalkaloid/TiIV‐catalyzed enantioselective tandem enamine–trifluoropyruvatecondensation–cyclizationreaction provides a robust method for the construction of small heterocyclic molecules with a quaternary trifluoromethylated carbon center (see scheme). The series of products are attractive templates and were readily converted to drug‐like trifluoromethylated heterocycles by conventional
药物设计:金鸡纳生物碱/ Ti IV催化的对映选择性串联烯胺-三氟丙酮酸缩合-环化反应为构建具有季三氟甲基化碳中心的小杂环分子提供了一种可靠的方法(参见方案)。该系列产品是有吸引力的模板,可通过常规方法轻松转化为药物样的三氟甲基化杂环。
Efficient Synthesis of Bicyclic α-Hydroxy-α-trifluoromethyl-γ-lactams
A facile method for the synthesis of bicyclic 3-hydroxy-3-trifluoromethyl-γ-lactams using a variety of enamines and ethyl trifluoropyruvate with or without a catalyst was examined.