Reaction of vinyl ethers with ArSCl adducts of d-glucal

Nucleophilic Substitution by Grignard Reagents on Sulfur Mustards

With proper activation of the leaving group, sulfur mustards react with Grignard reagents with neighboring group participation of the sulfur atom. 2,6-Dichloro-9-thiabicyclo[3.3.1]nonane is especially useful in this regard, providing clean reactivity with organomagnesium nucleophiles on a topologically constrained scaffold.

A one-pot synthesis of beta-C-glucopyranosides from exo-glucal, p-tolylsulfenyl chloride, an alpha-methoxyalkene, and an external nucleophile

[formula: see text] beta-C-Glycosides were synthesized in one-pot experiments using the following sequence of four reactions: (i) addition of p-TolSCl to an alpha-methoxyalkene, (ii) generation of the episulfonium ion from a beta-(arylsulfanyl)alkyl chloride, (iii) reaction of the episulfonium intermediate with benzylated exo-D-glucal to form a cyclic five-membered sulfonium salt, and (iv) quenching of the sulfonium salt with the external nucleophile: H2O, CH3OH, or NaCNBH3.

Stereoselective synthesis of C-[2-S-(p-tolyl)-2-thio-beta-D-galactopyranosyl] compounds using the reaction of TolSCl adducts of D-galactal with C-nucleophiles

Pyranosyl chlorides prepared in situ from tri-O-benzyl-D-galactal and TolSCl react with silyl enol ethers, allyltrimethylsilane, and vinyl ethers to give a mixture of beta-C-galacto and alpha-C-talopyranosides in a ratio of 19:1.