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CAS No. : | 19132-06-0 | MDL No. : | MFCD00063648 |
Formula : | C4H10O2 | Boiling Point : | - |
Linear Structure Formula : | CH3CH(OH)CH(OH)CH3 | InChI Key : | OWBTYPJTUOEWEK-IMJSIDKUSA-N |
M.W : | 90.12 | Pubchem ID : | 439888 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | General procedure: (R,R)-N,N?-dibenzyl-1,2-cyclohexanediamine (1.06 g, 3.6 mmol) and NEt3 (1.50 mL, 10.8 mmol) were dissolved in 10 mL of toluene.PCl3 (0.40 mL, 4.6 mmol) dissolved in 5 mL of toluene was addeddrop wise at 0 C. The mixture was allowed to warm up to roomtemperature and was stirred for 2 h. The formation of the chlorodiazaphospholidinewas monitored by 31P NMR spectroscopy(d 174.5 ppm) being complete after this period. The solvent andthe excess of PCl3 were thoroughly removed under reduced pressureto afford a viscous oil. This oil was dissolved in toluene (10 mL)and 1.3 mL of NEt3 was added. The corresponding diol (1.8 mmol),((S,S)-2,3-butanediol in toluene (10 mL), (4S,5S)-4,5-di(hydroxymethyl)-2,2-dimethyl-1,3-dioxolane and (R)-1,1?-bi-2-naphthol in THF (10 mL)) was added dropwise at 0 C. After 4 hof stirring, the white precipitate of triethylamine hydrochloridewas filtered off. The solvent was removed in vacuum and ayellowish oil was obtained and used without purification. a-(S,S;Sal,Sal;S,S)Yield: 970 mg (73%). [alpha]298 37.60 (c 1.0, CH2Cl2). 31P {1H}(CDCl3, 121,44 MHz), 1H NMR (CDCl3, 400 MHz) and 13C NMR(CDCl3, 100.6 MHz) were described for the enantiomer a-(R,R;Ral,-Ral;R,R) in previous work [15]. |
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