Preparation and Properties of Nα-Di-tert-Butoxycarbonyl Amino Acids. Applicability in the Synthesis of Leu-Enkephalin
The synthesis of Nα-di-tert-butoxycarbonyl amino acids starting from the corresponding mono-derivatives via a three-step route is reported.The latter were converted into a suitable ester and then exhaustively t-butoxycarbonylated, after which t
Gunnarsson, Kerstin,Ragnarsson, Ulf
p. 944 - 951
(2007/10/02)
9-FLUORENYLMETHYL ESTERS AS CARBOXYL PROTECTING GROUP
The use of 9-fluorenylmethyl esters for the protection of carboxyl groups is proposed.The advantage of this group is the selective deprotection under mild conditions using secondary amines without racemization.
Kessler, Horst,Siegmeier, Rainer
p. 281 - 282
(2007/10/02)
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