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investigation, it is necessary to defer publication of the details of the work until a later date. LABORATORY FOR ENDOCRINE RESEARCH H.JENSEN
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Anal. Calcd. for Cz4HHae02C1: C, 73.0; H, 10.0. Found: C, 73.3; H, 10.2. By treating with a phenyl Grignard reagent, 3-chloro-allo-bis-norSCHOOL OF MEDICINE cholanyldiphenylcarbinol was obtained, m. p. JOHNS HOPKINS UNIVERSITY 183'. Anal. Calcd. for C3sH470C1:C, 80.9; H, BALTIMORE, MARYLAND RECEIVED MARCH10, 1937 9.1. Found: C, 80.8: H, 9.3. This carbinol was oxidized by chromic acid to 3-chloro-bis-nor-allocholanic acid, m. p. 231'. A d . Calcd. for STEROLS. XII. SYNTHETIC PREPARATION OF C Z ~ H ~ ~ O ZC,C I71.9; : H, 9.6. Found: C, 71.8; Ef I-ALLO-PREGNANOLONE, THE ANDROGENIC H, 9.3. This acid was converted to its methyl PRINCIPLE OF HUMAN PREGNANCY URINE ester, m. p. 150'. Anal. Calcd. for CzaHa7OzCl: Sir: C, 72.5; H, 9.8. Found: C, 72.5; H, 9.8. By That human pregnancy urine contains a sub- treating with a phenyl Grignard reagent the carstance which has male hormone activity has been binol was obtained, m. p. 146'. Anal. Calcd. reported by several workers. Because of the for Cs4H460CI: C, 80.8; H, 9.0. Found: C, similarity in physiological activities in the male 80.9; H, 9.2. This carbinol was dehydrated by hormone tests between human pregnancy and refluxing with acetic acid and acetic anhydride. male urine extracts, it has been assumed that the The resulting product was ozonized and the ozomale principle in pregnancy urine was androster- nolysis product treated with potassium acetate to one. Heretofore this androgenic principle has convert the chloro derivative into an epi-OH comnot been isolated. pound [Marker, Whitmore and Kamm, THIS Recently, Marker, Kamm and McGrew [THIS JOURNAL, 57, 2358 (1935)l. The hydroxy ketone JOURNAL, 59, 616 (1937)l reported the isolation was purified by means of its half succinic ester and identification of epi-allo-pregnanolone from and then as the semicarbazone. It gave epi-allothe sterol fraction of human pregnancy urine pregnanolone, m. p. 170'. Anal. Calcd. for after the removal of theelin and theelol. At the GIHa4O2: C, 79.2; H, 10.7. Found: C, 78.9; time of this report we did not have the physiologi- H, 10.9. This was identical with the natural cal assays on this compound. Since then it has product which we isolated from human pregnancy been found that the substance isolated from urine. human pregnancy urine promotes the growth of THESCHOOL RUSSELL E. MARKER OF AND PHYSICS OLIVER K A X M the seminal vesicle in the rat tests. Preliminary CHEMISTRY PENNSYLVANIA STATECOLLEGE DAVIDM. JONES tests have shown this to have about the same ac- STATECOLLEGE, PA. EUGENE L. WITTLE THOUS s. OAKWOOD PARKE, DAVIS&-cO. tivity as androsterone. RESEARCH LABORATORIES HARRY M. CROOKS We have now prepared synthetically epi-allo- DETROIT, MICR. pregnanolone from 3-chloro-allo-cholanic acid, a RECEIVED MARCH18, 1937 by-product from the preparation of chloroandrosterone [Marker, Whitmore and Kamm, THIS JOURNAL 57, 2358 (1935)l. This was prepared STEROLS. XIlI. THE DIHYDROEQUILENINS by the stepwise degradation of the side-chain according to the method of Wieland [Z. physiol. Sir: Recently Wintersteiner, Schwenk, Hirschmann Chem., 161, 80 (1926)) 3-Chloro-allo-cholanic acid, m. p. 180°, was and Whitman [THIS JOURNAL, 58, 2652 (1936)l converted into its methyl ester, m. p. 133'. in their studies on the isolation of the 6-follicular A,naZ. Calcd. for C26H4102C1: C, 73.2; H, 10.1; hormone from the phenolic fraction of mare's Found: C, 72.8; H, 10.3. This was treated with urine obtained as the &follicularfraction a molecua phenyl Grignard reagent and the resulting car- lar compound of two components, one of which binol melted at 171'. Anal. Calcd. for C3eH4~- formed a picrate. This was isolated and identiOC1: C, 81.1; H, 9.2. Found: C, 81.1; H, 9.3. fied as dihydroequilenin. They suggested that It was oxidized by chromic acid to 3-chloro-allo- possibly the high estrogenic activity of the originor-cholanic acid. Anal. Calcd. for &Ha7O2C1: nally reported &follicular hormone [WinterC, 72.5; H, 9.8. Found: C, 72.8; H, 9.6. This steiner, Schwenk and Whitman, Proc. SOC.Exptl. acid was converted to its methyl ester, m. p. 178'. Biol. Med., 32, 1087 (1935)j is due to the other
