Mechanistic Studies on the Heck−Mizoroki Cross-Coupling Reaction of a Hindered Vinylboronate Ester as a Key Approach to Developing a Highly Stereoselective Synthesis of a C1−C7 <i>Z</i>,<i>Z</i>,<i>E</i>-Triene Synthon for Viridenomycin
作者:Andrei S. Batsanov、Jonathan P. Knowles、Andrew Whiting
DOI:10.1021/jo0626010
日期:2007.3.1
Mechanistic studies of the Heck−Mizoroki reaction of a vinylboronate ester with electronically different (four-substituted) aryl iodides shows that electron donors accelerate the cross-coupling, demonstrating that the oxidative addition step is not rate determining and that there is development of some degree of positive charge in the rate determining step. These results were used as a basis to allow
Stereodivergent Synthesis of (<i>E</i>)- and (<i>Z</i>)-2-Alken-4-yn-1-ols from 2-Propynoic Acid: A Practical Route via 2-Alken-4-ynoates
作者:Ryo Takeuchi、Keisuke Tanabe、Shigeru Tanaka
DOI:10.1021/jo991350a
日期:2000.3.1
A Closer Look at the Hydroiodination of Propiolic Acid
作者:James P. Donahue
DOI:10.1080/00397910600942826
日期:2006.11.1
The crystal structures of cis-3-iodoacrylic acid ( 1), trans-3-iodoacrylic acid ( 2), trans-3-iodoacrylic acid methyl ester ( 3), 3,3-diiodopropanoic acid ( 4), and trans-2,3-diiodoacrylic acid ( 5) are reported. Compounds 1 and 2 are the kinetic and thermodynamic products, respectively, of the hydroiodination of propiolic acid. Compound 4 results from addition of a second equivalent of hydroiodic acid to 1 or 2, whereas 5 results from the addition of trace elemental iodine to propiolic acid.