## Abstract (2__R__,4__S__,5__S__)‐(+)‐5‐(2,2‐Dichloroacetamido)‐4‐(4‐nitrophenyl)‐2‐aryl‐1,3‐dioxanes **3–8** were synthesized with high diastereoselectivity and good yields. The structures of acetals were determined and the configurations were confirmed by 2D‐NMR (NOESY) and X‐ray crystallographi
An improved synthesis of (4S,5S)-2,2-dimethyl-4-phenyl-1,3-dioxan-5-amine
✍ Scribed by Ivan C. Nordin; James A. Thomas
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 99 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
The title compound is prepared in 78% yield using an improved one-pot procedure which does not require final purification.
The title compound (4S,5S)-2,2-dimethyl-4-phenyl-1,3-dioxan-5-amine ( 1) is an effective reagent for the synthesis of optically active amino acids (2)l and d-methyl amino acids (3Jzs3 as shown in Scheme 1. The literature methods for the synthesis of 1 use a reaction scheme similar to Scheme 2, reporting 36X4 and 56X5 yields of1, depending on work-up conditions.
📜 SIMILAR VOLUMES
The title compound, C 12 H 14 N 6 , was synthesized via cyclocondensation of 5-amino-1-guanyl-3-phenyl-1,2,4-triazole with acetone. Only one tautomeric form with an H atom at the triazine N atom was observed in the crystal structure. The compound crystallizes with two almost identical molecules in t
In the title compound, C 14 H 15 NO 5 , the 1,3-dioxane-4,6-dione ring exhibits a half-chair conformation. The amino H atom has one intra-and one intermolecular contact to carbonyl O atoms, with OÁ Á ÁH distances of 2.11 (2) and 2.31 (2) A ˚.