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
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
Refined enantioselective methylation catalysts: improved routes to bifunctional C5 synthons
作者:Graham B Jones、Mustafa Guzel、Brant J Chapman
DOI:10.1016/s0957-4166(98)00076-7
日期:1998.3
Catalytic enantioselective routes to bifunctional C5 synthons, including those of the macrolide (S)-(−)-zearalenone have been achieved. Stereochemistry was introduced using a mixed ligand arene chromium tricarbonyl catalyst to mediate the enantioselective addition of dimethyl zinc to a functionalized aldehyde. Comparison with alternate reduction strategies is presented.
Novel type of sex pheromone structure identified fromStigmella malella (Stainton) (Lepidoptera: Nepticulidae)
作者:Miklós Tóth、Gábor Szöcs、Erik J. van Nieukerken、Peter Philipp、Frank Schmidt、Wittko Francke
DOI:10.1007/bf02033659
日期:1995.1
Short-chain unsaturated chiral methyl carbinols are identified as a new class of lepidopteran pheromone components. The natural female-produced pheromone of the banded apple pigmy Stigmella malella (= Nepticula malella) (Stainton) (Lepidoptera: Nepticulidae) was identified to be a mixture of (S)-(E)-6,8-nonadien-2-ol and (S)-(Z)-6,8-nonadien-2-ol. For monitoring traps, a 10:3 E:Z blend at 100-1000 mu g is recommended. It is suggested that pheromones with similar structures may be specific to Nepticulidae and other related microlepidopteran families.