Stereoselective Synthesis of Trisubstituted (<i>E</i>,<i>E</i>)-1,3-Dienes by the Site-Selective Reductive Cross-Coupling of Internal Alkynes with Terminal Alkynes: A Fragment Coupling Reaction for Natural Product Synthesis
作者:Lark J. Perez、Heidi L. Shimp、Glenn C. Micalizio
DOI:10.1021/jo901451c
日期:2009.10.2
olefinic coupling partners (vinyl halide or vinyl organometallic); it proceeds by a single convergent C−C bond-forming event (avoiding multistep methods based on carbonyl olefination) and is tolerant of a diverse array of functional groups including free hydroxyls. Through a systematic study of titanium-mediated reductive cross-coupling reactions of internalalkynes with terminalalkynes, a fragment
Studies in Macrolide Antibiotic Synthesis: The Role of Tethered Alkoxides in Titanium Alkoxide-Mediated Regioselective Reductive Coupling Reactions
作者:Adilah B. Bahadoor、Glenn C. Micalizio
DOI:10.1021/ol0600786
日期:2006.3.1
[reaction: see text] A convergent route to a C1-C15 fragment precursor for erythromycin-based macrolide antibiotics is presented. These studies define a role for tethered alkoxides in the control of site-selective carbon-carbon bond formation in titanium alkoxide-mediated coupling reactions of internal alkynes and chiral aldehydes.