The tide compounds were prepared from key intermediates readily obtained by the stereoselective Diels-Alder reaction of (Z)-2-pbenyl-4-[(S)-2,2-dimethyl-l,3dioxolan-4-ylmethylene]-5(4H)-oxazolone, a chiral az-lactone derived from (R)glyceraldehyde and cyclopentadiene.
Conformationally restricted P1-P1' transition state analogues. Synthesis of 1(R), 3(R) [1(S), 2(S)] and 1(S), 3(S) [1(S), 2(S)] 3-[3-cyclohexyl-2-[(BOC)amino]-1-hydroxypropyl]-2,2-dimethylcyclo propane carboxylic acids
✍ Scribed by Michael J. Melnick; Sharon N. Bisaha; Ronald B. Gammill
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 256 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
A concise synthesis and determination of absolute stereochemistry of two novel diastereomeric cyclopropyl containing transition state mimics isdescribed. A major advance in the development of renin inhibitors was the replacement of the scissile bond (PI-PI') with "transition state mimics" such as statinel (1) and Leu[CH(OH)CH&/alWJ (2, LVA). Thisstrategy replaced the PI-Pl'dipeptide with a nonhydrolysable analogue which contained a j%hydroxyl group thought to mimic a proposed transition state (3) in the enzyme-substrate
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## Synthesis and transformations of (1R,2R,3S,4R)-4-O- benzylhydroxylamino-2,3-O-isopropylidene-1,2,3-cyclopentanetrioh synthesis of (1S,2R,3S,4R)-4-amino-2,3-O-isopropylidene-l,2,3cyclopentanetriol
From an aqueous solution of racemic 2,3-dibromosuccinic acid and (__R__)-1-phenylethanamine, crystals of the title compound, C~8~H~12~N^+^·0.5C~4~H~2~Br~2~O~4~ ^2−^·0.5C~4~H~4~Br~2~O~4~·H~2~O, were obtained in almost quantitative yield. The structure contains both enantiomers of the starting materia
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