Antibody 38C2 efficiently catalyzes deuterium-exchange reactions at the alpha position of a variety of ketones and aldehydes, including substrates that have a variety of sensitive functional groups. In addition to the regio- and chemoselectivity of these reactions, the catalytic rates (kcat) and rate-enhancement values (kcat/kun) are among the highest values ever observed with catalytic antibodies
Photocatalysis. 6. Mechanism of the cyclotrimerization of trans-cycloheptene, catalyzed by copper(I) triflate
作者:Ton Spee、Adri Mackor
DOI:10.1021/ja00413a022
日期:1981.11
by replacing the reacted trans-cycloheptene at copper(I). The most likely explanation of these results is a concerted "template" cyclotrimerization process of either three (R)- or three (S)-trans-cycloheptene molecules around copper. Another possibility would be a two-step mechanism, involving a cupracyclopentane intermediate, irreversibly formed from two trans-cycloheptene molecules. No evidence for