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

Author: Helmkamp, George Kenneth

Year: 1953

Degree: Dissertation (Ph.D.)

Advisor: Lucas, Howard J.

Committee Member: Unknown, Unknown

Option: Chemistry; Biology

DOI: 10.7907/2VN2-KE23

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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