Stereoselective Isomerisation of N-Allyl Aziridines into Geometrically StableZ Enamines by Using Rhodium Hydride Catalysis
作者:Derek S. Tsang、Sharon Yang、France-Aimée Alphonse、Andrei K. Yudin
DOI:10.1002/chem.200701322
日期:2008.1.18
the most likely mechanism of isomerisation would involve a rhodium hydride addition/beta-hydride elimination sequence. We show that the observed selectivity cannot be adequately explained by this pathway and is more consistent with initial CH-activation followed by rearrangement to form a five-membered cyclometallated rhodium intermediate. This intermediate subsequently undergoes reductive elimination
Rhodium-Catalyzed Stereoselective Formation of <i>Z</i>-Enamines from Allylaziridines
作者:France-Aimée Alphonse、Andrei K. Yudin
DOI:10.1021/ja0632557
日期:2006.9.1
Rhodium (I)-catalyzedisomerization of N-allylaziridines affords isolable Z-enamines in excellent yields and with high stereoselectivity. Cationic [Rh(BINAP)(COD)]OTf and RhH(CO)(PPh3)3 follow the same selectivity toward the Z-isomers. This selectivity is not observed with other N-allylamines which give the thermodynamically more stable E-isomers. These unexpected results suggest a possible deviation
EREMEEV A. V.; POLYAK F. D.; STOLTSER T. V., LATVRSR ZINATNU AKAD. VESTIS. KIM. SER., IZV. AN LATVSSR. CEP. XIM., 1979+
作者:EREMEEV A. V.、 POLYAK F. D.、 STOLTSER T. V.
DOI:——
日期:——
Stereoselective synthesis of N-alkylaziridines from N-chloroamines
作者:Sean P. Bew、D. L. Hughes、Nicholas J. Palmer、Vladimir Savic、Katy M. Soapi、Martin A. Wilson
DOI:10.1039/b608504k
日期:——
We report the first racemic and stereoselective synthesis of cis- and trans-N-alkylaziridines viaN-chloroamines; using this methodology an N-3,4,5-trimethoxybenzylaziridine was synthesised and efficiently cleaved, affording the corresponding NH aziridine in high yield.
Preparation of optically active aziridine carboxylates by lipase-catalyzed alcoholysis
作者:Monique Martres、Gérard Gil、Alain Méou
DOI:10.1016/s0040-4039(00)78498-x
日期:1994.11
Aziridine carboxylates alcoholysis by lipases depends of the N-substituent. N-alkyl and N-aryl compounds have been resolved with medium to good enantiomeric purity by enzymatic alcoholysis catalyzed by pig pancreatic (PPL) or Candidacylindracealipase (CCL).