Browse Nearby Words vinylog vinylogous vinyl plastic See all Nearby Words Cite this Entry Style “Vinylogous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vi
网络乙烯类似物 网络释义 1. 乙烯类似物 乙烯类似物(Vinylogous)的向山羟醛过程还可以形成催化非对称性反应。下图展示了仅对芳香族醛的有效反应,其机理被认为 … zh.wikipedia.org|基于26个网页
We propose that the formation of related pharmacophoric groups follows the same general scheme and infer a unifying vinylogous branching reaction for PKS modules with a ketosynthase-branching–acyl-carrier-protein architecture. This study unveils the structure and function of a new PKS module that ...
210 5 vinylogous 烯丙基烷基化反应 近年来,不对称烯丙基烷基化反应成为有机小分子不对称催化的一个研究热点。2010 年,Chen 第一次报道了构建手性 γ,γ-二取代丁烯酸内酯化合物。他们发展了得到 γ-丁烯酸 内酯高对映体选择性和高立体选择性的烯丙基烷基化产物的方法,用 C 对称二聚物催化剂 2 (DHQD PY...
Herein, we first expand the possibilities of dynamic vinylogous urethane chemistry platform by showing that a precise control of the exchange kinetics can be achieved using a variety of simple additives. This precise control of the exchange reaction allows for the rational design of elastomers that ...
Two catalytic asymmetric vinylogous aldol-type reactions of aldehydes with allyl phosphonate and allyl sulfone have been uncovered in good to high yields for the first time. The bulky ligand—(R)-DTBM-SEGPHOS—was found to be the key to perfectly control both regio- and enantioselectivities. Tran...
博士学位论文---催化不对称Michael加成反应与手性诱导的vinylogousManncih反应的研究 ii 羧酸酯。 1.研究了手性α-亚胺酯与双烯醇硅醚的反应:在不同的催化剂催化下高区域选 择性地得到α-产物(α:γ=48:1)和γ-产物(α:γ<1:50)(vinylogousMannich 反应...
Two iterative vinylogous Mukaiyama aldol reactions (VMAR) have been applied in order to selectively install three contiguous stereocenters at C37, C38 and C39, of the southern hemisphere of lagunamide A. The VMAR methodology allows straightforward access of enantiomerically pure material of the essent...
Vinylogous porphyrins 来自 百度文库 喜欢 0 阅读量: 21 申请(专利)号: US07/108706 申请日期: 19871015 公开/公告号: US04798891A 公开/公告日期: 19890117 申请(专利权)人: BASF AKTIENGESELLSCHAFT 发明人:B Franck,M Gosmann 被引量: 8 摘要: Compounds of the general formula I ##STR1## where the ...
糖诱导不对mannich反应和α-羰基膦酸酯vinylogous mukaiyama aldol反应研究 摘要 摘要 第一部分: Mannich反应在有机合成 三烷基呋喃硅醚和亚胺进行的不对称Vinylogous 中有着重要的应用,它是合成具有光学活性生物碱的重要方法。本文综述了不 Mannich反应最新研究进展,在此基础上设计合成了半乳糖胺 对称Vinylogous Mannieh...