Synthesis and biological activity of carboxyphenylquinolines and related compounds as new potent retinoids. Retinobenzoic acids. VII

Preparation of pyrrolizinone derivatives via sequential transformations of cyclic allyl imides: synthesis of quinolactacide and marinamide

A facile synthetic route toward the preparation of pyrrolizinone derivatives has been developed and applied for the synthesis of quinolactacide/marinamide.

Pyrazole CCK(1) receptor antagonists. Part 1: Solution-phase library synthesis and determination of Free-Wilson additivity

High throughput screening revealed compound 1 as a potent antagonist of the CCK(1) receptor. Evaluation of the CCK(1) SAR in a series of these diarylpyrazole antagonists was conducted in a matrix synthesis format revealing additive (Free-Wilson) and non-additive SAR. This use of additive QSAR modeling in conjunction with combinatorial libraries represents a unique approach to the evaluation of SAR interactions between the variables of any combinatorial matrix.

Highly Chemoselective Oxidation of Dithioester Enethiolates to Sulfenates: Application to the Synthesis of Ketene Dithioacetal S-Oxides

Enethiolates derived from dithioesters were efficiently converted into the corresponding vinyl sulfenates by oxidation with a unique N-sulfonyloxaziridine 1a derived from pinacolone. Subsequent alkylation with alkyl halides led to ketene dithioacetal S-oxides in good to excellent yields.