Abstract
RELIABLE methods are given in this useful volume for the preparation of a further selection of twenty-nine organic compounds. Each of the main structural divisions of organic chemistry is interestingly represented in the list. Among the aliphatic substances are acetylenedicarboxylic acid, from fumaric acid via a-dibromosuccinic acid; allylamine, from allyl isothiocyanate; taurine, from ethanolamine, via -bromoethylamine hydrobromide; and betaine hydrazide hydrochloride (Girard's reagent). The introduction of two of the less familiar elements into aromatic molecules is exemplified by the preparation of 4,4'-difluorobiphenyl, from benzi-dine; and of diphenyl selenide, diphenylselenium dichloride, and triphenylselenonium chloride, starting from diazotized aniline and potassium selenide. The condensation of?-phenylbutyric ester with oxalic ester, followed by cyclization, yields 3,4-dihydro-1,2-naphthalic anhydride, which is then dehydro-genated with sulphur at 230-250°, yielding 1,2-naphthalic anhydride.
Organic Syntheses:
an Annual Publication of Satisfactory Methods for the Preparation of Organic Chemicals. Vol. 18. Pp. v + 103. (New York: John Wiley and Sons Inc London ; ' Chapman and Hall, Ltd., 1938.) 8s. 6d. net.
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R., J. Organic Syntheses. Nature 142, 457 (1938). https://doi.org/10.1038/142457b0
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DOI: https://doi.org/10.1038/142457b0
