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200517.fm Page 222 Friday, March 18, 2005 2:52 PM
2005
Nucleic acids
U 0700
Controlling Stereochemistry During Oxidative Coupling. Preparation of Rp or Sp
from One P-Chiral Precursor. — The direct oxidative coupling
17- 202 Phosphoramidates
of (Sp)-(I) via the corresponding phosphoroiodidate proceeds with inversion of configuration. In contrast, treatment of iodidate with chloride proceeds with an additional
inversion of configuration and thus the phosphoramidate (Sp)-(IV) is produced with net
retention of configuration. — (NILSSON, J.; STAWINSKI*, J.; Chem. Commun.
(Cambridge) 2004, 22, 2566-2567; Dep. Org. Chem., Arrhenius Lab., Univ.
Stockholm, S-106 91 Stockholm, Swed.; Eng.) — M. Paetzel
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