Valence Tautomerism in Titanium Enolates: Catalytic Radical Haloalkylation and Application in the Total Synthesis of Neodysidenin
作者:Stéphane Beaumont、Elizabeth A. Ilardi、Lucas R. Monroe、Armen Zakarian
DOI:10.1021/ja910154f
日期:2010.2.10
A direct ruthenium-catalyzed radical chloroalkylation of N-acyloxazolidinones capitalizing on valence tautomerism of titanium enolates has been developed. The chloroalkylation method served as the centerpiece in the enantioselective total synthesis of trichloroleucine-derived marine natural product neodysidenin.
Concise Total Synthesis of Sintokamides A, B, and E by a Unified, Protecting-Group-Free Strategy
作者:Zhenhua Gu、Armen Zakarian
DOI:10.1002/anie.201005354
日期:2010.12.10
One for all: A group of polychlorinated marine peptides known as sintokamides show intriguing activity against hormone‐refractory prostate cancer cells. Three members of the group have now been synthesized by a general strategy enabled by a ruthenium‐catalyzed radical chloroalkylation of titanium enolates (see scheme).
Efficient Total Synthesis of Dysidenin, Dysidin, and Barbamide
作者:Elizabeth A. Ilardi、Armen Zakarian
DOI:10.1002/asia.201100338
日期:2011.9.5
The total syntheses of three trichloroleucine‐derived marine natural products—dysidenin, dysidin, and barbamide—capitalized on a practical and highly diastereoselective ruthenium catalyzed radical chloroalkylation of N‐acyloxazolidinones as the key step.