Controlled linkage: PhSeOTf-promoted glycosylations of a variety of acceptor alcohols with 4,6-O-benzylidene-2,3-di-O-benzylmannopyranosyl pentenoate afford β-mannopyranosides in high yields and with excellent stereoselectivity (see scheme). This method is even better than other known methods for the mannosylation of simple reactive primary alcohols. Tf=trifluoromethanesulfonyl, TTBP=2,4,6-tri-tert-butylpyrimidine.
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Baek et al. (2006) studied this question.
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