Synthesis of 2‐Amino‐octa‐4,7‐Dien‐1‐ol (2): Key Intermediate for Mycothiazole Natural Product and Analogs
摘要:
Starting from L-aminoacids, facile methods for the preparation 2-aminocta-4,7-dien-ol with different stereochemistry have been developed as key intermediates of mycothiazole and analogs.
Inactivation of medium-chain acyl-CoA dehydrogenase by a metabolite of hypoglycin: characterization of the major turnover product and evidence suggesting an alternative flavin modification pathway
作者:Ming Tain Lai、Ding Li、Eugene Oh、Hung Wen Liu
DOI:10.1021/ja00058a001
日期:1993.3
Medium-chain acyl-CoAdehydrogenase (MCAD) is a FAD-dependent enzyme af catalyzes the first step of the fatty acid oxidation cycle. When MCAD is exposed to (methylenecyclopropyl)acetyl-CoA (MCPA-CoA), a metabolite of hypoglycin A and the causative agent of Jamaican vomiting sickness, time-dependent inactivation follows with concomitant bleaching of the active-site FAD. Earlier studies have led to the
中链酰基辅酶A脱氢酶(MCAD)是一种FAD依赖性酶,催化脂肪酸氧化循环的第一步。当 MCAD 暴露于(亚甲基环丙基)乙酰辅酶 A (MCPA-CoA)(一种次甘氨酸 A 的代谢物和牙买加呕吐病的病原体)时,时间依赖性失活会伴随着活性部位 FAD 的漂白。较早的研究导致假设失活可能涉及由瞬时α-环丙基自由基诱导的自发环断裂,因此提出单电子氧化途径
Palladium catalyzed coupling of organostannanes with vinyl epoxides
作者:David R. Tueting、Antonio M. Echavarren、J.K. Stille
DOI:10.1016/0040-4020(89)80010-9
日期:1989.1
The coupling reaction of organotin reagents with vinyl epoxides, catalyzed by palladium, takes place at ambient temperatures, regioselectively, giving predominately the 1,4-addition product. Both aryl- and vinylstannanes undergo coupling in high yields, while acetylenic, allylic and benzylic tin reagents either give low yields or fail to couple. Although the double bond geometry in the vinylstannane
Indium-mediated regioselective Markovnikov allylation of unactivated terminal alkynes
作者:Brindaban C. Ranu、Adinath Majee
DOI:10.1039/a702241g
日期:——
Allylation of unactivated terminal alkynes by a simple treatment with
allyl bromide and indium metal in THF at room temperature produces
1,4-dienes via regioselective Marknovnikov addition.
Double Ring-Closing Metathesis Reaction of Nitrogen-Containing Tetraenes: Efficient Construction of Bicyclic Alkaloid Skeletons and Synthetic Application to Four Stereoisomers of Lupinine and Their Derivatives
作者:Shengming Ma、Bukuo Ni
DOI:10.1002/chem.200305581
日期:2004.7.5
The doublering-closingmetathesisreaction of nitrogen-containingtetraenes was studied. The selectivity of the fused/dumbbell-type products can be controlled by the electronic/steric effects of the substituents attached to the C[double bond]C bonds and the s-cis/s-trans conformational ratios of the substrates. This methodology has also been successfully applied to the enantioselective synthesis of
Multifaceted catalysis approach to nitrile activation: direct synthesis of halogenated allyl amides from allylic alcohols
作者:Roy P. Lester、Jay J. Dunsford、Jason E. Camp
DOI:10.1039/c3ob41692e
日期:——
Allyl amides were synthesised from the reaction of allylalcohols and halogenated nitriles using a platinum multifaceted catalysis approach in which both the nucleophilic addition and subsequent [3,3]-sigmatropic rearrangement steps of the process were catalysed by the same complex. Additionally, 1H/13C1H} NMR and GC studies provided the first insights into the mechanism of this transformation.
使用铂多面催化方法从烯丙醇与卤化腈的反应中合成烯丙基酰胺,其中该过程的亲核加成和随后的[3,3]-σ重排步骤均由相同的配合物催化。此外,1 H / 13 C 1 H} NMR和GC研究提供了对该转化机理的初步见解。