The first total synthesis of the rearranged aromatic sesquiterpene (+/-)-laurokamurene B, isolated from the Chinese red alga Laurencia okamurai Yamada, has been accomplished, confirming the structure of the natural product. A combination of Ireland-Claisen rearrangement and ring-closing metathesis was employed as key reactions. (c) 2007 Elsevier Ltd. All rights reserved.
Reaction ofγ-Hydroxy-N-[1-(dimethylcarbamoyl)ethyl]butanamides under the ‘Direct Amide Cyclization’ Conditions
作者:Boyan Iliev、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200690008
日期:2006.1
the imino lactones was achieved by increasing the substitution in the five-membered ring, and their structure, in the form of the hydrochlorides, was established independently by X-raycrystallography (Fig. 4). A derivative 15 of the imino lactone 12a was prepared by the reaction with the 2H-azirin-3-amine 10a; its structure was also established by an X-ray crystal-structure determination (Fig. 3).
SATURATED-RING-FUSED DIHYDROPYRIMIDINONE OR DIHYDROTRIAZINONE COMPOUNDS AND PHARMACEUTICAL USE THEREOF
申请人:Japan Tobacco Inc.
公开号:US20190300490A1
公开(公告)日:2019-10-03
The present invention relates to saturated-ring-fused dihydropyrimidinone or dihydrotriazinone compounds, or pharmaceutically acceptable salts thereof, having RORγ antagonist activity, pharmaceutical compositions comprising the same, and pharmaceutical use thereof. A compound of Formula [I] or a pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the same, and pharmaceutical use thereof are provided:
wherein each substituent is defined as defined in the description.
Source of Rate Acceleration for Carbocation Cyclization in Biomimetic Supramolecular Cages
作者:Quynh Nhu N. Nguyen、Kay T. Xia、Yue Zhang、Nanhao Chen、Mariko Morimoto、Xiaokun Pei、Yang Ha、Jinghua Guo、Wanli Yang、Lee-Ping Wang、Robert G. Bergman、Kenneth N. Raymond、F. Dean Toste、Dean J. Tantillo
DOI:10.1021/jacs.2c04179
日期:2022.6.29
quantum chemical and molecular dynamics calculations reveal that polyanionic gallium-based cages accelerate cyclization reactions of pentadienyl alcohols as a result of substrate cage interactions, preferential binding of reactive conformations of substrate/H3O+ pairs, and increased substrate basicity. However, the increase in basicity dominates. Experimental structure–activity relationship studies
量子化学和分子动力学计算结果表明,聚阴离子镓基笼由于底物笼相互作用、底物/H 3 O +对的反应构象的优先结合以及底物碱度增加而加速了戊二烯醇的环化反应。然而,碱度的增加占主导地位。金属顶点和笼的总电荷变化的实验结构-活性关系研究证实了通过计算得出的模型。
Enantioselective Catalysis of the Aza-Cope Rearrangement by a Chiral Supramolecular Assembly
作者:Casey J. Brown、Robert G. Bergman、Kenneth N. Raymond
DOI:10.1021/ja906386w
日期:2009.12.9
The chiral supramolecular catalyst Ga(4)L(6) [L = 1,5-bis(2,3-dihydroxybenzoylamino)naphthalene] is a molecular tetrahedron that catalyzes the 3-aza-Cope rearrangement of allyl enammonium cations. This catalysis is accomplished by preorganizing the substrate in a reactive conformation within the host. This work demonstrates that through the use of enantiopure assembly, its chiral cavity is capable
SATURATED RING-CONDENSED DIHYDROPYRIMIDINONE OR DIHYDROTRIAZINONE COMPOUND, AND PHARMACEUTICAL USE THEREOF
申请人:Japan Tobacco Inc.
公开号:EP3760619A1
公开(公告)日:2021-01-06
The present invention relates to saturated-ring-fused dihydropyrimidinone or dihydrotriazinone compounds, or pharmaceutically acceptable salts thereof, having RORγ antagonist activity, pharmaceutical compositions comprising the same, and pharmaceutical use thereof. A compound of Formula [I] or a pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the same, and pharmaceutical use thereof are provided:
wherein each substituent is defined as defined in the description.