Hindered dialkyl ether synthesis with electrogenerated carbocations
作者:Jinbao Xiang、Ming Shang、Yu Kawamata、Helena Lundberg、Solomon H. Reisberg、Miao Chen、Pavel Mykhailiuk、Gregory Beutner、Michael R. Collins、Alyn Davies、Matthew Del Bel、Gary M. Gallego、Jillian E. Spangler、Jeremy Starr、Shouliang Yang、Donna G. Blackmond、Phil S. Baran
DOI:10.1038/s41586-019-1539-y
日期:2019.9.19
simple route towards the synthesis of hindered ethers, in which electrochemical oxidation is used to liberate high-energy carbocations from simple carboxylic acids. These reactive carbocation intermediates, which are generated with low electrochemical potentials, capture an alcohol donor under non-acidic conditions; this enables the formation of a range of ethers (more than 80 have been prepared here)
Total synthesis of the putative structure of the marine metabolite trunkamide A
作者:Peter Wipf、Yoshikazu Uto
DOI:10.1016/s0040-4039(99)00957-0
日期:1999.7
The structure assigned to trunkamide A, a cycloheptapeptide alkaloid isolated from the colonial ascidian Lissoclinum sp., was prepared via segment condensations and an efficient oxazoline-thiazoline interconversion. The novel reverse prenylated serine and threonine amino acid building blocks were obtained by Lewis acid assisted opening of aziridines. In light of this total synthesis, the structure of natural trunkamide A needs to be revised. (C) 1999 Elsevier Science Ltd. All rights reserved.