I. Stereochemistry of the Reaction of D(+)-2, 3-Epoxybutane with Alcohols. II. The Coordination Reaction Between Silver Ion and Alkynes. III. Some Relationships of Sterols to Plant Growth

Citation

Helmkamp, George Kenneth (1953) I. Stereochemistry of the Reaction of D(+)-2, 3-Epoxybutane with Alcohols. II. The Coordination Reaction Between Silver Ion and Alkynes. III. Some Relationships of Sterols to Plant Growth. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/2VN2-KE23. https://resolver.caltech.edu/CaltechETD:etd-05082003-105201

Abstract

PART I. The reaction between D(+)-2,3-epoxybutane and alcohols is accompanied by a Walden inversion. The 3-methoxy-2-butanol prepared in this manner is an erythro-isomer, for meso-2,3-dimethoxybutane can be prepared from it by the Williamson synthesis. PART II. Permanganate oxidation under alkaline conditions has been employed as a method for the quantitative determination of aqueous solutions of 3-hexyne. 3-Hexyne and several homologs (methyl groups in the 1-, 2- and 5-positions) have been synthesized. Argentation constants for these have been evaluated by means of their solubilities in aqueous solutions of silver ion at constant ionic strength. PART III. A survey has been made concerning the effect of various steroidal substances on growth of pea embryos. A strong inhibition was noted in the presence of testosterone. Estrone and saponins tended to enhance early growth.

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