A series of regioisomers for dithiafulvenyl-substituted phenylacetylene derivatives was synthesized and characterized to show structure-dependent electronic properties and different reactivities in their oxidized states.

A novel three hindered quadrant bisphosphine ligand has been synthesized. The ligand shows excellent enantioselectivities and reactivities for rhodium-catalyzed hydrogenations of various functionalized olefins.

Saccharide oxyanions obtained by base treatment could be employed in glycosylation to give oligosaccharides with high stereo- and regioselectivities.

RECENT investigations have demonstrated the importance of the benzylpenicilloyl group as an antigenic determinant in benzylpenicillin (PG) hypersensitivity (Levine and Ovary, 1961) (Fig. 1). It has been suggested that this antigen is formed by the conjugation to protein of the highly reactive intermediate, benzylpenicillenic acid (Fig. 1, B). A number of conventional penicillins derived from 6-...

The molecular basis for the mechanism of contraction in striated muscle, with primary emphasis on the interaction between the thick and thin filaments and the role of the thin (actin) filaments, is the theme presented. Recent information relating to actin-myosin interaction points up the fact that definitive statements cannot be made regarding the molecular interaction(s) that lead to contracti...