868632-26-2

Upstream product

• 95530-58-8 (R)-4-isopropyloxazolidin-2-one 
• 2304-94-1 3-(benzyloxycarbonylamino)propanoic acid 
• 868632-19-3 (4R)-3-(3-{[(tert-butoxy)carbonyl]amino}-1-oxopropyl)-4-(1-methylethyl)oxazolidin-2-one 
• 868632-20-6 (4R)-3-[(2S)-2-({[(benzyoxy)carbonyl]amino}methyl)-3-hydroxy-3-{1-[(2,2,2-trichloroethoxy)carbonyl]-indolyl-3-yl}-1-oxopropyl]-4-(1-methylethyl)oxazolidin-2-one 

Downstream Products

• 499136-28-6 (4R)-3-[(2S)-2-({[(benzyoxy)carbonyl]amino}methyl)-3-{1-[(tert-butoxy)carbonyl]-indolyl-3-yl}-1-oxopropyl]-4-(1-methylethyl)oxazolidin-2-one 
• 499136-29-7 (2S)-2-({[(benzyoxy)carbonyl]amino}methyl)-3-{1-[(tert-butoxy)carbonyl]-indolyl-3-yl}propanoic acid 

Relevant academic research and scientific papers

Preparation of β2-amino acid derivatives (β2hThr, β2hTrp, β2hMet, β2hPro, β2hLys, pyrrolidine-3-carboxylic acid) by using DIOZ as chiral auxiliary

The title compounds were prepared from valine-derived N-acylated oxazolidin-2-ones, 1-3, 7, 9, by highly diastereoselective (≥ 90%) Mannich reaction (→ 4-6; Scheme 1) or aldol addition (→ 8 and 10; Scheme 2) of the corresponding Ti- or B-enolates as the key step. The superiority of the '5,5-diphenyl-4-isopropyl-1,3-oxazolidin-2-one' (DIOZ) was demonstrated, once more, in these reactions and in subsequent transformations leading to various t-Bu-, Boc-, Fmoc-, and Cbz-protected β2-homoamino acid derivatives 11-23 (Schemes 3-6). The use of ω-bromo-acyl-oxazolidinones 1-3 as starting materials turned out to open access to a variety of enantiomerically pure trifunctional and cyclic carboxylic-acid derivatives.