Cyclopentannulation reactions with organoiron reagents. Facile construction of functionalized hydroazulenes
作者:M. Rosenblum、J. C. Watkins
DOI:10.1021/ja00173a020
日期:1990.8
ketohydroazulene cycloadducts derived, in each reaction, from a single tautomeric tropyllium cation. The further reaction of two such cycloadducts with lithium dimethyl cuprate gave tricyclic ketones, through a sequence depicted as involving initial formation of an anionic acyliron complex, followed by migratory insertion and an intramolecular aldolcondensation
Unique Condensation Reactions of Tropones with Bis(benzoylthio)trithiafulvene Leading to 10a<i>H</i>-Cyclohepta[<i>c</i>]-1,3-dithiolo[<i>e</i>][1,2]dithiin-2-thione
Reactions of tropone derivatives with 4,5-bis(benzoylthio)-1,3-dithiole-2-thione (2,3,6-trithiafulvene derivative) afforded 1,3,5-cycloheptatriene derivatives doubly substituted by trithiafulvene and S–S groups (10aH-cyclohepta[c]-1,3-dithiolo[e][1,2]dithiin-2-thione). The structure of the 1,3,5-cycloheptatriene derivative and its crystal structure were investigated by single crystal X-ray analysis to show the existence of a unique three-dimensional network of the molecules through S···S contacts.
[6 + 4] and [4 + 2] Cycloaddition Reactions of Cobaloxime 1,3-Dienyl Complexes and Tropones
作者:Ramakrishna R. Pidaparthi、Mark E. Welker、Cynthia S. Day
DOI:10.1021/om050983e
日期:2006.2.1
to participate in cycloaddition reactions with a variety of tropones. In general, tropones that do not contain electron-withdrawing substituents react with dienyl complexes via [6 + 4] cycloaddition and tropones that are substituted with at least one additional electron-withdrawing group react via [4 + 2] cycloaddition. Both types of metal-substituted cycloadducts ([6 + 4] and [4 + 2]) presented here
ON THE REACTION OF<i>N</i>-VINYLIMINOPHOSPHORANES. A NOVEL ROUTE TO 1-AZAAZULENE RING SYSTEM UTILIZING AZA-WITTIG REACTION
作者:Makoto Nitta、Tomoshige Kobayashi
DOI:10.1246/cl.1986.463
日期:1986.4.5
phenylphosphorane, conveniently prepared from α-azidostyrene and triphenylphosphine, readily undergoes an annelation reaction with tropone derivatives to result in the formation of 1-azaazulene ringsystem.