C8c–C15 monoseco-analogues of the phenanthroquinolizidine alkaloids julandine and cryptopleurine exhibiting potent anti-angiogenic properties
摘要:
Four enantiomerically pure monoseco-analogues, 5, 7, 9, and 11, of the phenanthroquinolizidine alkaloid julandine (1) and four of congener cryptopleurine (2), viz. compounds 6, 8, 10, and 12, have been prepared and subjected to preliminary biological evaluation. These analogues show dramatically reduced cytotoxicity compared with the parent system 2 but they are, nevertheless, potent anti-angiogenic agents. (c) 2005 Elsevier Ltd. All rights reserved.
The copper‐photocatalyzed borylation of aryl, heteroaryl, vinyl and alkyl halides (I and Br) was reported. The reaction proceeded using a new heteroleptic Cu complex under irradiation with blue LEDs, giving the corresponding boronic‐acid esters in good to excellent yields. The reaction was extended to continuous‐flow conditions to allow an easy scale‐up. The mechanism of the reaction was studied and
据报道,铜光催化的芳基,杂芳基,乙烯基和烷基卤化物(I和Br)的硼化反应。该反应在蓝色LED的照射下使用一种新型的杂铜配合物进行,从而得到了相应的硼酸酯,收率良好至极佳。反应扩展到连续流动条件,以易于放大。研究了该反应的机理,并提出了基于还原淬灭(Cu I / Cu I * / Cu 0)的机理。
Synthesis and Biological Evaluation of Some Enantiomerically Pure C8c - C15 Monoseco Analogues of the Phenanthroquinolizidine-Type Alkaloids Cryptopleurine and Julandine
作者:Magne O. Sydnes、Anna Bezos、Christopher Burns、Irma Kruszelnicki、Christopher R. Parish、Stephen Su、A. David Rae、Anthony C. Willis、Martin G. Banwell
DOI:10.1071/ch08190
日期:——
A series of enantiomerically pure C8c–C15 monoseco analogues, 23–30, of the alkaloidscryptopleurine (1) and julandine (2) have been prepared using cinnamyl chloride 37 and (S)- or (R)-2-methylpiperidine as key building blocks. Two related compounds, 31 and 32, have also been synthesized. Each of these analogues has been subjected to various biological evaluations and most of them show dramatically