Synthetic and Mechanistic Studies on the Azabicyclo[7.3.1]enediyne Core and Naphtho[2,3-<i>h</i>]quinoline Portions of Dynemicin A
作者:Philip Magnus、Shane A. Eisenbeis、Robin A. Fairhurst、Theodore Iliadis、Nicholas A. Magnus、David Parry
DOI:10.1021/ja970435v
日期:1997.6.1
the bonding acetylenes was virtually identical. A non-radical cycloaromatization pathway, initiated by thiol addition to the enediynesystem, was discovered, and the simple core amine 26 exhibits modest in vitro and in vivo antitumor activity. Finally, two methods for the synthesis of the naphtho[2,3-h]quinoline portion of dynemicin A are described, and both these compounds also exhibit antitumor activity
dynemicin A 的 13-keto-10-azabicyclo[7.3.1]enediyne 核心结构的合成已通过两条路线实现,即方案 4 和方案 6。13-酮核结构的化学主要由异常简单的桥头桥决定烯醇化。各种烯二炔的环芳构化速率的比较表明,即使键合乙炔之间的距离几乎相同,也会发生显着的速率差异。发现了由硫醇加成到烯二炔系统引发的非自由基环芳构化途径,并且简单的核心胺 26 表现出适度的体外和体内抗肿瘤活性。最后,描述了合成 dynemicin A 的萘并 [2,3-h] 喹啉部分的两种方法,并且这两种化合物也表现出抗肿瘤活性。
Nickel‐Catalyzed Amination of Silyloxyarenes through C–O Bond Activation
作者:Eric M. Wiensch、John Montgomery
DOI:10.1002/anie.201806790
日期:2018.8.20
Silyloxyarenes were utilized as electrophilic coupling partners with amines in the synthesis of aniline derivatives. A diverse range of amine substrates were used, including cyclic or acyclic secondary amines, secondary anilines, and stericallyhindered primary anilines. Additionally, a range of stericallyhindered and unhindered primary aliphatic amines were employed, which have previously been challenging with
A rapid entry into the dynemicin core structure: remarkable solvent effect on an η<sup>2</sup>-hexacarbonyldicobalt propargylic cation cyclization
作者:Philip Magnus、Simon M. Fortt
DOI:10.1039/c39910000544
日期:——
3-(tert-Butyldimethylsilyloxy)quinoline 8 on treatment with the diynene 9 gave the diynene 10(64%), and deprotection of 10 gave 11(88%) which was converted into the η2-Co2(CO)6 adduct 12; treatment of 12 with (CF3SO2)2O in CH2Cl2âMeNO2 at â10°C gave the cyclized product 13(43%), and decomplexation of 13 using I2âTHF produced the stable azabicyclo[7.3.1]tridecadiynene core structure 7 of the antitumour antibiotic dynemicin 1.