36431-72-8Relevant articles and documents
Amberlyst-15-catalyzed intramolecular S(N)2' oxaspirocyclization of secondary allylic alcohols. Application to the total synthesis of spirocyclic ethers theaspirane and theaspirone
Young, Jenn-Jong,Jung, Liarng-Jyur,Cheng, Kuang-Ming
, p. 3415 - 3418 (2007/10/03)
A variety of substituted 1-oxaspiro[4.4]non-6-ene. 1-oxaspiro[4.5]dec-6- ene, 6-oxaspiro[4.5]dec-1-ene and 1-oxaspiro[5.5]undec-7-ene systems have been prepared by utilizing Amberlyst-15-catalyzed intramolecular S(N)2' oxaspirocyclizations of secondary allylic alcohols under mild reaction conditions in quantitative yields. This oxaspirocyclization was applied to the total synthesis of theaspirane and theaspirone from β-ionone in five steps. (C) 2000 Elsevier Science Ltd.
A NOVEL SELENIUM-MEDIATED SPIROANNELATION: ONE-STEP PREPARATION OF d1-THEASPIRANE FROM α-DIHYDROIONOL
Uneyama, Kenji,Fujibayashi, Shoji,Torii, Sigeru
, p. 4637 - 4638 (2007/10/02)
dl-Theaspirane (1) was prepared by the selenium-mediated electrochemical oxidation of α-dihydroionol (2), via a novel selenium-mediated spiroannelation.
Isolation, tentative identification, and synthesis studies of the volatile components of the hairpencil secretion of the monarch butterfly
Bellas,Brownlee,Silverstein
, p. 2267 - 2271 (2007/10/07)
The major volatile components of the hairpencil secretion of the male monarch butterfly have been identified as benzyl caproate and either 1, 5, 5, 9-tetramethyl-10-oxabicyclo[4.4.0]-3- decen-2-one(1), or 2, 2, 6, 8-tetramethyl-7-oxabicyclo[4.4.0]-4-decen-3-one(2). One sequence designed to synthesize 1 yielded two isomeric products of structure 1 whose spectra are very similar to each other but distinctly different from those of the natural product; this sequence also yielded a tricyclic ketal (9). A second sequence gave two epimeric spiro compounds (12) and a third sequence gave a [4.3.0] ring system (14).