Levene

If the two lEven CSFs whieh eross are allowed to interaet (the SC rules give their interaetion strength in terms of the exehange integral... 

Propylene oxide [75-56-9] (methyloxirane, 1,2-epoxypropane) is a significant organic chemical used primarily as a reaction intermediate for production of polyether polyols, propylene glycol, alkanolamines (qv), glycol ethers, and many other useful products (see Glycols). Propylene oxide was first prepared in 1861 by Oser and first polymerized by Levene and Walti in 1927 (1). Propylene oxide is manufactured by two basic processes the traditional chlorohydrin process (see Chlorohydrins) and the hydroperoxide process, where either / fZ-butanol (see Butyl alcohols) or styrene (qv) is a co-product. Research continues in an effort to develop a direct oxidation process to be used commercially. 

Recrystd from abs EtOH dried in vacuo and stored in tightly stoppered bottles because it is hygroscopic. It is soluble in H2O but insoluble in CgHg, Et20 and alkaline aqueous soln. It has UV at 258 and 307.5nm (log e 4.50 and 3.50) in EtOH (neutral species). [Craig et al. J Org Chem 22 709 1957.] It is a calmodulin inhibitor [Levene and Weiss J Parmacol Exptl Ther2Q% 454 1978], and js a psychotropic agent [Fowler Arzneim.-Forsch 27 866 1977]. 

The possible therapeutic applications of these alkaloids as proto-zooicidal agents, coronary dilators and ecbolics, and in nervous diseases, for example in the treatment of post-encephalitic conditions, have been discussed by a number of authors. The alkylharmols, referred to above, form part of an extensive series prepared by Coulthard, Levene and Pyman, and tested by these authors for bactericidal properties and by... 

Of the four possible 5-deoxy-pent-4-enofuranoses, the D-erythro-isomer was of interest as a potential source of derivatives of L-lyxofuranose. For this purpose, a vinyl ether having the D-en/ hro-configuration has been prepared from derivatives of D-ribose. Condensation of D-ribose with acetone in the presence of methanol, cupric sulfate and sulfuric acid at 30°C., as described by Levene and Stiller(30) afforded a sirupy product consisting mainly of methyl 2,3-O-isopropylidene-D-ribofuranose (40). Treatment of a pyridine solution of the sirup with tosyl chloride... 

Levens, Safety Considerations in Handling Perchlorates in ibid, 187 14) F.A. Warren et al,... 

Zimm, BH Levene, SD, Problems and Prospects in the Theory of Gel Electrophoresis of DNA, Quarterly Reviews of Biophysics 25, 171, 1992. 

Levene, RA. LaForge, RB. (1914) Note on a Case of Pentosuria. Journal of Biological Chemistry, 18, 319-327. 

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