Can I read Constituents of genus petasites—IV on EtoBox?

Constituents of genus petasites—IV by K. Shirahata; T. Kato; Y. Kitahara; N. Abe is a Chemistry article available to read on EtoBox.

What is Constituents of genus petasites—IV about?

Ah&act-A group of a new type of sesquiterpene, named bakkenolide\_A, B, C, D, and E was isolated from the buds of Permires juponicus (Sieb. et Zucc.) Maxim. subsp. giganteus (Fr. S&m.) Kitam. (Japanese name, Akita-buki). They have a novel spiro-y-lactone grouping. The structure and stereochemistry including absolute configuration was established for bakkenolide-A (B-A) (1) on the basis of chemical degradations (Chart I, 2) and physical measurements. The C,,dicarboxylic acid (5). a main degradation product of B-A during potassium permanganate oxidation, was instrumental in determination of the full structure. The absolute configuration was based on the transformation of B-A to the known perhydroindanone derivative (12). THE antitussive and peptic properties of buds of the genus Petasites have been known in Japan and groups2 have reported the isolation of sesquiterpenes with the eremophilane skeleton from Petusites juponicus. Novotny et cd3 also have reported many studies on the components of European Petasites. We were interested in the medicinal properties and the bitter principle of Petasites juponicus (Sieb. et Zucc.) Maxim. subsp. giganteus (Fr. Schm.) Kitam., the distribution o

Who reads Constituents of genus petasites—IV?

Author

K. Shirahata; T. Kato; Y. Kitahara; N. Abe

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4020)

Published

1969

Language

EN

Field

Chemistry (Physical Sciences)