The parent compound of azuleno[1,2-a]acenaphthylene (8) was synthesized, and its 1H NMR spectrum suggests no bond alternation in the azulene moiety. The cycloaddition of 8 with dimethyl acetylenedicarboxylate gave an acenaphthyleno[1,2-d]heptalene derivative.
Takase–Yasunami azulene synthesis. Its 1H and 13C NMR spectra indicate that 1a comprises azulene and naphthalene rather than acenaphtylene and heptafulvene in accordance with speculation drawn from a previous study of the DEPE calculations. The solid-state structure of 1a was elucidated by X-ray crystallographical analysis, indicating that 1a is nearly planar and exhibits little bond alternation as
采用高濑-靖南a合成方法,由1-吡咯烷基戊二烯(5)和2 H-环庚基[ b ]呋喃-2-酮(6)制备了azuleno [1,2- a ] a(1a)。根据先前对DEPE计算的研究得出的推测,其1 H和13 C NMR光谱表明1a包含a和萘,而不是a庚烯和七氟戊烯。通过X射线晶体学分析阐明了1a的固态结构,表明1a在MB3LYP / 6-311G *理论水平的优化结构中,几乎呈平面状,几乎没有键交替。通过X射线分析观察到的所有键长与所计算的键长在0.024Å内吻合良好。在热解条件下1a进行了氮杂-萘重排,得到9和10。在7位上观察到1a的亲电取代,在3位上观察到第二个反应。的环加成反应1A与乙炔二(DMAD),得到1:1的环加成物与庚搭烯骨架16A和1:2环加成物19,与取代产物沿17。还描述了环加合物16a和19的X射线结构分析。
NOVEL REACTIONS OF 1-(1-PYRROLIDINYL)ACENAPHTHYLENE WITH DIPHENYLCYCLOPROPENONE AND DIPHENYLCYCLOPROPENETHIONE
An enamine, 1-(1-pyrrolidinyl)acenaphthylene, reacts with diphenylcyclopropenone to give δ-aminocyclopentenone derivative together with a trace amount of acecyclone. In the reaction of the enamine with diphenylcyclopropenethione, however, γ-aminocyclopentenethione derivative is formed as the major product accompanied by another 1:1 adduct which was tentatively assumed to be a benzothiophene derivative
Several cyclic enamines with five to seven-memberedrings react with 2-(1,2-diphenyl-3-cyclopropenylidene)propanedinitrile to give medium ringcompounds, showing that the latter is a versatile reagent which can insert three carbon atoms between α- and β-carbons of cyclic enamines. These medium ringcompounds undergo transannular reactions on treatment with hydrochloric acid to yield fulvene derivatives with
REGIOSELECTIVE COPE REARRANGEMENT OF [2+2] CYCLOADDUCT OF 2-PHENYL-2-(1,2-DIPHENYL-3-CYCLOPROPENYLIDENE)ACETONITRILE TO AN ENAMINE LEADING TO PENTALENE DERIVATIVES
2′]cyclopenta[4,5-a]acenaphthylenes is the first example in which a phenyl group on the methylenecyclopropene ring took part in a cyclization: They are presumed to form via the regioselective Cope rearrangement of initially formed endo [2+2] cycloadducts followed by a hydrogen shift.