Synthesis of enantiomerically pure hydroxylated pyrroline N-oxides from d-ribose
摘要:
A convenient way to obtain enantiomerically pure hydroxylated pyrroline N-oxides is reported. The key step is the formation of omega-oxo criciates from (D)-ribose and a subsequent 1,3-azaprotio cyclotransfer reaction of the resulting oximino alkenoate derivatives. The stereochemistry of the nitrones obtained is discussed in relation to that of the starting compounds. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of enantiomerically pure hydroxylated pyrroline N-oxides from d-ribose
摘要:
A convenient way to obtain enantiomerically pure hydroxylated pyrroline N-oxides is reported. The key step is the formation of omega-oxo criciates from (D)-ribose and a subsequent 1,3-azaprotio cyclotransfer reaction of the resulting oximino alkenoate derivatives. The stereochemistry of the nitrones obtained is discussed in relation to that of the starting compounds. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of S-functionalized thioesters using thioaroylate ions derived from carboxylic acids and tetrathiomolybdate via acyloxyphosphonium intermediates
Thioaroylate ions generated in situ from acyloxyphosphonium salts and tetrathiomolybdate upon Michael addition or ring opening of three membered systems led to a facile synthesis of S-functionalized thioesters. While the ring opening of aziridines gave very good yield of the products, Michael addition and epoxide ring opening gave moderate yields.
Synthesis of enantiomerically pure hydroxylated pyrroline N-oxides from d-ribose
作者:Nikolaos G. Argyropoulos、Theodoros D. Panagiotidis、John K. Gallos
DOI:10.1016/j.tetasy.2006.02.006
日期:2006.3
A convenient way to obtain enantiomerically pure hydroxylated pyrroline N-oxides is reported. The key step is the formation of omega-oxo criciates from (D)-ribose and a subsequent 1,3-azaprotio cyclotransfer reaction of the resulting oximino alkenoate derivatives. The stereochemistry of the nitrones obtained is discussed in relation to that of the starting compounds. (c) 2006 Elsevier Ltd. All rights reserved.