Studies on Acetylenic Compounds. XXVI. Ring Closure.(6). New Synthetic Method of Heterocyclic Compounds from α-Substituted Acetylenic Compounds
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New acetylenic norlignan compounds from rhizomes of Curculigo crassifolia.
Two pairs of diastereoisomeric acetylenic norlignan compounds with PhCH(OR(1))CH(OR(2))CH(2)C triple bond CPh skeleta: (1R, 2R)-1-O-methylnyasicoside (1) and (1S, 2R)-1-O-methylnyasicoside (2), and (1R, 2R)-crassifogenin D (3) and (1S, 2R)- crassifogenin D (4), were isolated from the ethanolic extract of rhizomes of Curculigo crassifolia. Compounds 3 and 4 are new and their structures were eluc...
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A CRYSTALLINE condensation product of glucose and urea was first described by Schoorl [1900, 1, 2; 1903]. So thorough did the last communication appear to be, that, apart from the synthesis of glucose ureide accomplished by Fischer [1914], the condensation of glucose and urea does not seem to have been further investigated. As indicated in the previous paper [Hynd, 1926], it was found difficult...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1962
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.10.1094