METHOD FOR PRODUCING LAMELLARIN AND DERIVATIVE THEREOF
申请人:Tunghai University
公开号:US20180273543A1
公开(公告)日:2018-09-27
The present application discloses a method for producing lamellarin and a derivative thereof, which is able to greatly shorten the synthesis path of the lamellarin and the derivative thereof, and to improve the yield of the lamellarin and the derivative thereof, so as to increase use of the lamellarin or the derivative thereof in pharmaceutical industry.
Construction of Pentacyclic Lamellarin Skeleton via Grob Reaction: Application to Total Synthesis of Lamellarins H and D
作者:Kiran B. Manjappa、Jhih-Min Lin、Ding-Yah Yang
DOI:10.1021/acs.joc.7b01061
日期:2017.7.21
coumarin-pyrrole-isoquinoline-fused pentacycle via base-promoted Grob-type coupling of 3-nitrocoumarin and papaverine in a sealedtube is reported. This reaction is further applied to the total synthesis of lamellarin H in three linear steps and lamellarin D in eight linear steps with overall yields of 31% and 14%, respectively.
Concise Synthesis of Lamellarin Alkaloids by C–H/N–H Activation: Evaluation of Metal Catalysts in Oxidative Alkyne Annulation
作者:Ruhuai Mei、Shou-Kun Zhang、Lutz Ackermann
DOI:10.1055/s-0036-1591209
日期:2017.9
The performance of various transition-metal catalysts was explored in the step-economical synthesis of naturally occurring lamellarin alkaloids by C–H/N–H activation. The oxidativealkyneannulation proceeded efficiently by using sustainable ruthenium(II) catalysis, which set the stage for a concise synthesis of lamellarin D, lamellarin H and derivatives thereof.
通过 C-H/N-H 活化一步经济地合成天然层状菌素生物碱,探索了各种过渡金属催化剂的性能。通过使用可持续的钌 (II) 催化,氧化炔环化有效进行,为层状蛋白 D、层状蛋白 H 及其衍生物的简洁合成奠定了基础。
Convergent total synthesis of lamellarin K†
作者:Martin Banwell、David Hockless
DOI:10.1039/a705874h
日期:——
The azomethine ylide derived from dihydroisoquinolinium salt 24 undergoes an intramolecular [3 + 2] cycloaddition reaction to give pyrrole 25 which upon de-isopropylation affords the marine alkaloid lamellarin K 4.
A New Approach to Pyrrolocoumarin Derivatives by Palladium-Catalyzed Reactions: Expedient Construction of Polycyclic Lamellarin Scaffold
作者:Lei Chen、Ming-Hua Xu
DOI:10.1002/adsc.200900287
日期:2009.8
A new and efficient protocol for straightforward synthesis of chromeno[3,4-b]pyrrol-4(3H)-one derivatives by palladium-catalyzed sequential coupling/cyclization reactions has been developed. The key strategy relies on creation of pyrrole ring through palladium-catalyzedintramolecular hydroamination of related acetylenic aminocoumarins. The synthetic utility of the obtained chromeno[3,4-b]pyrrol-4(3H)-one
开发了一种新的有效协议,可以通过钯催化的顺序偶联/环化反应直接合成chromeno [3,4- b ] pyrrol-4(3 H)-one衍生物。关键策略依赖于通过钯催化相关炔属氨基香豆素的分子内加氢胺化来形成吡咯环。通过四步法方便地合成多环lamellarin支架,已证明了所获得的chromeno [3,4- b ]吡咯-4(3 H)-产物的合成效用。它为合成潜在有价值的lamellarin类似物提供了新的机会。