Synthesis of cephalosporins with substituted thiadiazoles directly attached to the C3-position. I. Synthesis of 3-(5-substituted-1,3,4-thiadiazol-2-yl)ceph-3-em derivatives.
Additives for lubricating oils, and lubricating oils containing such additives
申请人:UNION OIL COMPANY OF CALIFORNIA
公开号:EP0314843A1
公开(公告)日:1989-05-10
Additives for lubricating oils, especially automatic transmission fluids, are disclosed comprising a heterocyclic compound containing boron and of the formula
wherein R is inorganic or organic and R₁ and R₂ are the same or different organic radicals, in admixture with or as the reaction product of reaction with an ester of a polyhydric alcohol. The boron-containing heterocyclic compound may contain sulfur. It may comprise the product of reacting together ammonia or a primary amine, an aliphatic or aromatic epoxide and a boric acid in a ratio of 1: 2: 1. Lubricating oils and transmission fluids containing these additives are also disclosed.