The synthesis of 1,1-difluoro-1-alkenes was achieved by the treatment dithioesters and thioketones with trimethylsilyl 2-fluorosulfonyl-2,2-difluoroacetate in presence a proton sponge catalyst, namely, 1,8-bis(dimethylamino)naphthalene. generated electrophilic difluorocarbene (:CF2) reacted thiocarbonyl functionalities to form 2,2-difluorothiirane intermediates, desulfurization which afforded p...

Rate constants for the reactions of substituted quinuclidines with pnitrophenyl phosphate, 2,4-dinitrophenyl phosphate, 2,4-dinitrophenyl phosphate complexed with calcium, and phosphorylated pyridine decrease with increasing pKa of the amine. Plots of log k against pK, give slopes of @ , , = -0.05, -0.10, -0.1 1, and 4.10, respectively, for these.compounds; &, = -0.01 for phosphorylated 4-morph...

The ionic nucleophilic character of ammonium betaine catalysts allows for controlling the ROP of L-LA for DP as high as 750 with very narrow dispersity values (≤1.18). Compared to ionic nucleophilic and hydrogen-bonding based catalysts for ROP, meta-betaine combines the positive aspects of both processes in terms of kinetics and selectivity. The versatility of ammonium betaines was evidenced by...

The first thorium poly-carbene complexes [(Ph(2)P=S)(2)C](2)Th(DME) (2) and [{[(Ph(2)P=S)(2)C](3)Th}Li(2)(DME)](n) (3) have been prepared and structurally characterized. DFT calculations reveal that the Th=C bond is polarized toward the nucleophilic carbene carbon atom, which is further verified by the experimental observation that the Th=C bond shows a nucleophilic behavior with Ph(2)CO.