Virtually complete diastereoselectivity is observed in the intramolecular amidation of saturated CH bonds, catalyzed by the ruthenium porphyrin catalyst 1 or 2. Reactions of sulfamate esters with PhI(OAc)2 in the presence of 1 or 2 afforded cyclic sulfamidates in up to 87 % ee.
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Liang et al. (2002) studied this question.