RESUMO
Whereas lactose did not undergo a base-catalyzed transesterification with methyl esters of fatty acids, methyl beta-lactoside reacted under identical conditions to give mono- and di-myristates. This difference in behavior is explained in terms of the formation of an unreactive, internally chelated potassium-lactose complex. Supporting evidence for this hypothesis is the observed change in the anomeric equilibrium of lactose in the presence of potassium carbonate. The monomyristates of methyl beta-lactoside were assigned the structures of 3' and 6' derivatives, and it is concluded that the diesters are the 3',6', and 6,6' derivatives.
Assuntos
Lactose/análogos & derivados , Miristatos , Ácidos Mirísticos , Fenômenos Químicos , Química , ÉsteresRESUMO
The history of U.S. foreign aid support of science and technology in Latin America is examined and an attempt is made to evaluate the scientific and economic growth of that area in relation to the total foreign aid effort.