Patent ID: 8236945

Claim:
A compound of formula (IIa) R1-S—CH 2 —CH 2 —Si(R4)(R5)(R6) as intermediate compound in the preparation of disulfides and thiosulfinates, wherein R1 represents a hydrocarbon molecular residue, which can be substituted and/or interrupted by one or more atoms and/or by one or more groups comprising one or more atoms, said atoms being chosen from the group consisting of N, O, S, Si or X, where X represents a halogen; R4, R5 and R6, are identical or different, each represent, independently of one another, a hydrocarbon group; and the compound is chosen from the group consisting of: 2′-deoxy-3′-(O-mesyl)-2′-(2-(trimethylsilyl)ethyl)thiouridine 47 5′-O-(tert-butyldiphenylsilyl)-2′-(2-(trimethylsilyl)ethyl)thiocytidine 48 N-4-benzoyl-3′-(O-mesyl)-5′-(O-tert-butyldiphenylsilyl)-2′-(2-(trimethylsilyl)ethyl)thiocytidine 49 1-(3′-(2-(trimethylsilyl)ethylthio)-β-D-xylofuranos-1′-yl)thymine 52 and 2,2′-anhydro-5′-(O-benzoyl)-1-(3′-(2-(trimethylsilyl)ethylthio)-β-D-xylofuranos-1′-yl)thymine 53.