拟青霉素 E 和 F 及其两个同系物 Cochliomycin C 和 6-epi-Cochliomycin C 的立体选择性全合成
摘要:
摘要描述了一种高效、简洁的方法来全合成拟青霉素 E (1) 和 F (2)、Cochliomycin C (4) 和 6-epi-Cochliomycin C (3)。该合成涉及合成拟青霉素 E 和 F 并进一步转化为 Cochliomycin C 和 6-epi-Cochliomycin C 的新途径。烯烃复分解和碱促进大环内酯化是关键反应,然后氯化以达到目标 Cochliomycin C 和 6-epi -Cochliomycin C. 图形摘要
Stereoselective Total Syntheses of Paecilomycins E and F through a Protecting Group Directed Diastereoselective Intermolecular Nozaki-Hiyama-Kishi (NHK) Reaction
作者:Debendra K. Mohapatra、D. Sai Reddy、N. Arjunreddy Mallampudi、Jhillu S. Yadav
DOI:10.1002/ejoc.201402133
日期:2014.8
An efficient and concise approach to the total syntheses of paecilomycins E (1) and F (2) is described. A protecting group directed intermolecular diastereoselective Nozaki–Hiyama–Kishi (NHK) reaction, a Julia–Kocienski olefination, a Sharpless asymmetric dihydroxylation, and De Brabander's lactonization protocol are used as the key steps.
描述了一种有效而简洁的方法来进行 paecilomycins E (1) 和 F (2) 的全合成。保护基团导向的分子间非对映选择性 Nozaki-Hiyama-Kishi (NHK) 反应、Julia-Kocienski 烯化、Sharpless 不对称二羟基化和 De Brabander 的内酯化方案被用作关键步骤。
Nine-Step Stereoselective Synthesis of Islatravir from Deoxyribose
作者:Christopher C. Nawrat、Aaron M. Whittaker、Mark A. Huffman、Mark McLaughlin、Ryan D. Cohen、Teresa Andreani、Bangwei Ding、Hongming Li、Mark Weisel、David M. Tschaen
DOI:10.1021/acs.orglett.0c00239
日期:2020.3.20
A stereoselective nine-step synthesis of the potent HIV nucleoside reverse transcriptase translocation inhibitor (NRTTI) islatravir (EfdA, MK-8591) from 2-deoxyribose is described. Key findings include a diastereodivergent addition of an acetylide nucleophile to an enolizable ketone, a chemoselective ozonolysis of a terminal olefin and a biocatalytic glycosylation cascade that uses a unique strategy
An efficient and enantioselective total synthesis of naturally occurring L-783277
作者:Hwan Geun Choi、Jung Beom Son、Dong-Sik Park、Young Jin Ham、Jung-Mi Hah、Taebo Sim
DOI:10.1016/j.tetlet.2010.07.122
日期:2010.9
Naturally occurring L-783277 which belongs to 14-membered resorcylicacidlactones (RALs) turned out to be a potent kinase inhibitor against MEK (MAP kinase kinase). We successfully accomplished efficient and enantioselective total synthesis of L-783277 based on convergent assembly of one aromatic unit and two chiral building blocks with efficient orthogonal protection-deprotection strategy. Three
A concise synthesis of the ten-membered lactone 26 is described which constitutes the key intermediate of a previous total synthesis of the marine natural product ascidiatrienolide 1 and can also be elaborated into the closely related didemni- lactones 2 ± 4 .T heE/Z-ratio obtained in the ring- closing metathesis (RCM) reaction forging such non- enolide structures is found to be dependent on the relative
The stereoselectivesynthesis of the WXYZA'-ring system of maitotoxin has been accomplished via a linear synthetic approach, in which key reactions were SmI 2-induced cyclization of beta-alkoxyacrylate for the construction of the A'-, Y-, and X-rings and 6- endo cyclization of hydroxy vinylepoxide for that of the Z- and W-rings.