The Preparation of Nonracemic Secondary α-(Carbamoyloxy)alkylzinc and Copper Reagents. A Versatile Approach to Enantioenriched Alcohols
摘要:
GRAPHICSChiral alpha-(carbamoyloxy)alkyllithium reagents, prepared using Hoppe's sBuLi/(-)-sparteine methodology, were transmetalated with ZnCl2. Further transmetalation with CuCN with overall retention of configuration gave chiral species that reacted with various electrophiles to give enantiomerically pure alcohols after deprotection. A short, highly efficient synthesis of an industrially relevant pheromone, japonilure, illustrates the value of the methodology.
Asymmetric Allyl- and Crotylboration with the Robust, Versatile, and Recyclable 10-TMS-9-borabicyclo[3.3.2]decanes
作者:Carlos H. Burgos、Eda Canales、Karl Matos、John A. Soderquist
DOI:10.1021/ja043612i
日期:2005.6.1
preparation of 6. The reagent gives predictable stereochemistry and exhibits an extremely high level of reagent control in the allylboration of d-glyceraldehyde acetonide. A simple and efficient procedure has been developed for the preparation of all four geometric and enantiomeric isomers of the B-crotyl-10-TMS-9-BBDs (10) from optically pure enantiomers of B-MeO-10-TMS-9-BBD (3). These reagents 10 also add
Target-Based Design of Promysalin Analogues Identifies a New Putative Binding Cleft in Succinate Dehydrogenase
作者:Savannah J. Post、Colleen E. Keohane、Lauren M. Rossiter、Anna R. Kaplan、Jittasak Khowsathit、Katie Matuska、John Karanicolas、William M. Wuest
DOI:10.1021/acsinfecdis.0c00024
日期:2020.6.12
synthesis; subsequent analogue design and SAR investigation enabled identification of succinate dehydrogenase (Sdh) as the biological target in PA. Herein, we report the target-guided design of new promysalin analogues with varying alkyl chains, one of which is on par with our most potent analogue to date. Computational docking revealed that some analogues have a different orientation in the Sdh binding
Promysalin 是一种小分子天然产物,可特异性抑制革兰氏阴性病原体铜绿假单胞菌( PA ) 的生长。这项活动有望治疗患有慢性疾病(如囊性纤维化)的免疫功能低下患者的多重耐药感染。 2015年,我们实验室完成了首次全合成;随后的类似物设计和 SAR 研究使琥珀酸脱氢酶 (Sdh) 确定为PA的生物靶标。在此,我们报告了具有不同烷基链的新型原米沙林类似物的靶向设计,其中一种与我们迄今为止最有效的类似物相当。计算对接表明,一些类似物在 Sdh 结合袋中具有不同的方向,将末端碳置于色氨酸残基附近。这启发了带有末端苯基部分的延伸侧链类似物的设计,为未来类似物的设计提供了基础。
Enantio- and Diastereoselective Synthesis of 1,5-<i>syn</i>-(<i>Z</i>)-Amino Alcohols via Imine Double Allylboration: Synthesis of <i>trans</i>-1,2,3,6-Tetrahydropyridines and Total Synthesis of Andrachcine
作者:Christophe Allais、William R. Roush
DOI:10.1021/acs.orglett.7b00995
日期:2017.5.19
A stereoselective synthesis of trans-1,2,3,6-tetrahydropyridines 8 is described. This synthesis proceeds via intramolecular Mistunobu reactions of 1,5-syn-(Z)-amino alcohols 7, which were prepared by a highly diastereo- and enantioselective double-allylboration reaction of aldehyde 5 and silylimine 6. The chiral bifunctional γ-borylallylborane 9E was generated in situ by hydroboration of allene 3 with
A short enantioselective total synthesis of the phytotoxic lactone herbarumin III
作者:Joshodeep Boruwa、Naminita Gogoi、Nabin C. Barua
DOI:10.1039/b605982a
日期:——
The phytotoxic lactone herbarumin III has been synthesized in 11% overall yield. The approach applied uses Keck's asymmetric allylation and Sharpless epoxidation to build the key fragment. Esterification with 5-hexenoic acid and a ring closing metathesis was used to arrive at the target.
The present invention relates to a macrolide compound expected to have a cell growth-inhibiting activity and a novel anticancer drug utilizing the compound. Specifically, the invention relates to a compound represented by Formula (I) or (II) or a pharmaceutically acceptable salt thereof and relates to a cell growth inhibitor and an anticancer drug each containing the compound or the salt as an active ingredient.