Synthesis of Aryldiazoacetates through Palladium(0)-Catalyzed Deacylative Cross-Coupling of Aryl Iodides with Acyldiazoacetates
作者:Fei Ye、Chengpeng Wang、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201407653
日期:2014.10.20
Palladium(0)‐catalyzed deacylative cross‐coupling of aryl iodides and acyldiazocarbonyl compounds can be achieved at room temperature under mild reaction conditions. The coupling reaction represents a highly efficient and general method for the synthesis of aryldiazocarbonyl compounds, which have found wide and increasing applications as precursors for generating donor/acceptor‐substituted metallocarbenes
Enantioselective Synthesis of Spliceostatin G and Evaluation of Bioactivity of Spliceostatin G and Its Methyl Ester
作者:Arun K. Ghosh、Guddeti Chandrashekar Reddy、Andrew J. MacRae、Melissa S. Jurica
DOI:10.1021/acs.orglett.7b03456
日期:2018.1.5
An enantioselective total synthesis of spliceostatin G has been accomplished. The synthesis involved a Suzuki cross-coupling reaction as a key step. The functionalized tetrahydropyran ring was constructed from commercially available optically active tri-O-acetyl-d-glucal. Other key reactions include a highly stereoselective Claisen rearrangement, a Cu(I)-mediated 1,4 addition of MeLi to install the
作者:Zheng‐Jun Wang、Xiangyang Chen、Lei Wu、Jonathan J. Wong、Yong Liang、Yue Zhao、Kendall N. Houk、Zhuangzhi Shi
DOI:10.1002/anie.202016573
日期:2021.4.6
conspicuously underdeveloped. Here, we develop a general strategy for the site‐selective C−Hborylation of pyrroles by using only BBr3 directed by pivaloyl groups, avoiding the use of any metal. The site‐selectivity is generally dominated by chelation and electronic effects, thus forming diverse C2‐borylated pyrroles against the steric effect. The formed products can readily engage in downstream transformations
Palladium(II)-catalyzed tandem annulation reaction of o-alkynylbenzoates with methyl vinyl ketone for the synthesis of isocoumarins
作者:Huan Wang、Xiuling Han、Xiyan Lu
DOI:10.1016/j.tet.2013.07.057
日期:2013.10
A palladium(II)-catalyzed highly regioselective tandem reactions of o-alkynylbenzoates with methyl vinyl ketone for the synthesis of isocoumarins was developed. It is a convenient, mild and environmentally benign reaction with moderate to high yield. The reaction is initiated by the Pd(II) species and regenerate the Pd(II) species to complete the catalytic cycle without the necessity of a redox system
A totalsynthesis of (+)-brefeldin C (BFC) and two brefeldin A (BFA) analogues - (+)-nor-Me BFA and (+)-4-epi-nor-Me BFA - has been developed. Key features of the syntheses include desymmetrization of meso anhydrides, a Carreira reaction to control the absolute configuration at C4 of BFC, a Suzuki-Miyaura cross-coupling reaction to create the C11-C12 bond and a Yamaguchi reaction to form the 13-membered
(+)-brefeldin C (BFC) 和两种 brefeldin A (BFA) 类似物 - (+)-nor-Me BFA 和 (+)-4-epi-nor-Me BFA - 的全合成已经开发出来。合成的关键特征包括内消旋酐的去对称化、控制 BFC C4 绝对构型的 Carreira 反应、产生 C11-C12 键的 Suzuki-Miyaura 交叉偶联反应和形成 13 元内酯的 Yamaguchi 反应戒指。