Studies on 2-Aziridinecarboxylic Acid. IX. Convenient Synthesis of Optically Active<i>S</i>-Alkylcysteine,<i>threo</i>-<i>S</i>-Alkyl-β-methylcysteine, and Lanthionine Derivatives<i>via</i>the Ring-opening Reaction of Aziridine by Several Thiols
作者:Kiichiro Nakajima、Hitomi Oda、Kenji Okawa
DOI:10.1246/bcsj.56.520
日期:1983.2
and benzyl (2S,3S)-1-benzyloxycarbonyl-3-methyl-2-aziridinecarboxylate, and their enantiomers were treated with several thiols, and the corresponding S-alkylcysteine, threo-S-alkyl-β-methylcysteine, and lanthionine derivatives were prepared via the ring-openingreaction of aziridine in the presence of a catalytic amount of boron trifluoride etherate in good yields.
6-anhydro-D-glycero-L-gluco-heptitol-1-yl]-L-serine 3 and-L-threonine 4 were synthesized, employing regio- and stereoselective aziridine ring opening methodology. They proved to be stable in the presence of glycosidases and showed competitive inhibition of alpha-galactosidase from Aspergillusniger.
The reaction of aziridine derivatives having a urethane-type protectinggroup with several alcohols in the presence of borontrifluorideetherate afford the corresponding optically pure O-alkylserine and O-alkylthreonine derivatives via a ring-opening reaction of aziridine in good yield.
Synthesis of Opically Active 3-Morpholinecarboxylic Acid and Tetrahydro-2<i>H</i>-1,4-thiazine-3-carboxylic Acid
作者:Yuji Kogami、Kenji Okawa
DOI:10.1246/bcsj.60.2963
日期:1987.8
A convenient synthesis of optically active 3-morpholinecarboxylic acid and its thio analogue, tetrahydro-2H-1,4-thiazine-3-carboxylic acid, has been developed. These intermediates were obtained by reaction of benzyl (S)-N-benzyloxycarbonyl-2-aziridinecarboxylate and its enantiomer with 2-chloroethanol or 2-chloroethanethiol, respectively.
Scandium-Mediated Opening of Aziridine Carboxylates: A Facile Synthesis of Aryl Substituted Tryptophans
作者:Youssef L. Bennani、Gui-Dong Zhu、Jennifer C. Freeman
DOI:10.1055/s-1998-1773
日期:1998.7
The treatment of enantiomerically pure L-serine-derived N-Cbz- or N-Fmoc-aziridine carboxylates with indole derivatives in the presence of a stoichiometric amount of Sc(Otf)3 in dichloromethane at 0 °C or RT gives the aryl-substituted and protected tryptophan derivatives in good yields. Attempts to catalyze the reaction are also reported.