Amino Acids, Peptides and Proteins (SPR Amino Acids, by John S. Davies

By John S. Davies

This product isn't really to be had individually, it is just bought as a part of a collection. There are 750 items within the set and those are all bought as one entity. summary: This product isn't on hand individually, it's only bought as a part of a collection. There are 750 items within the set and those are all bought as one entity

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Extra info for Amino Acids, Peptides and Proteins (SPR Amino Acids, Peptides, and Proteins (RSC)) (Vol 35)

Sample text

The former were produced via a copper-bisoxazoline-catalysed aza-Henry (nitroaldol) reaction between silyl nitronates and a-imino esters. 2-Nitromethyl-ornithine has been obtained430 from ornithine, mediated by cobalt (III), and S-nitroso-Lcysteine ethyl ester, known to be involved in trans -S-nitrosation of thiol Amino Acids, Pept.

Trans-3,4-Piperidindicarboxylic acid derivative (46) and a trans-3, 4-analogue have been synthesised198 asymmetrically in 5 steps starting from aspartic acid t-butyl ester and Z-(S)-alanine respectively via intermediates which on ozonolysis and reductive animation provided the cyclic structures. Five and six-membered cyclic amino acids can be obtained199 in a one-pot protocol by a rhodium-catalysed (Rh-DuPHOS) hydroformylation/ 18 Amino Acids, Pept. Proteins, 2006, 35, 1–73 cyclisation sequence.

A number of 3-substituted prolines have been synthesised enantioselectively169 starting from 3-OH-(S)-2Pro using the enol triflate derived from N-trityl-3-oxo-(S)-2-proline methyl ester, followed by hydrolysis/hydrogenation. A chirally stabilised azomethine ylide170 from 5-(S)-5-phenylmorpholin-2-one and 2,2-dimethoxypropane has been trapped diastereoselectively with singly and doubly-activated dipolarophiles to give cycloadducts dismantled in one-pot to enantiomerically pure 5,5-dimethylproline derivatives.

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