Tandem reactions of N,N-dialkylamides with organolithium compounds and cyclopentadiene. A new efficient synthesis of pentafulvenes
作者:Hiroyuki Kurata、Tatsuya Ekinaka、Takeshi Kawase、Masaji Oda
DOI:10.1016/s0040-4039(00)79179-9
日期:1993.5
Reactions of N,N-dialkylamides with organolithium compounds followed by addition of cyclopentadiene furnish 6-mono- or 6,6-di-substituted pentafulvenes in moderate to high yields, providing a new and simple pentafulvene synthesis.
Dichloroketen adducts of 6,6-diphenylfulvene and 8,8-diphenylbenzofulvene
作者:Robert E. Harmon、William D. Barta、S. K. Gupta、George Slomp
DOI:10.1039/j39710003645
日期:——
The reaction of dichloroketen with 6,6-diphenylfulvene afforded a crystalline cycloadduct identified as cis-7,7-dichloro-4-diphenylmethylenebicyclo[3,2,0]hept-2-en-6-one by n.m.r. and chemical degradation studies. Similarly, the adduct obtained from dichloroketen and 8,8-diphenylbenzofulvene was shown to be cis-2,2-dichloro-2,2a,7,7a-tetrahydro-7-diphenylmethylene-1H-cyclobut[a]inden-1-one by n.m.r
二氯酮与6,6-二苯基富烯的反应提供了结晶环加合物,其通过核磁共振和化学降解研究鉴定为顺式-7,7-二氯-4-二苯基亚甲基双环[3,2,0]庚-2-烯-6-。类似地,从二氯酮和8,8-二苯基苯并富烯中获得的加合物显示为顺式-2,2-二氯-2,2a,7,7a-四氢-7-二苯基亚甲基-1 H-环丁[ a ] inden-1-一种通过核磁共振分析。
Cycloadditionsreaktionen des tetrachlor-o-benzochinons mit fulvenen
Tetrahloro-o-benzoquinone (1) reacts with 6,6-diphenyl- and 6,6-bis (p-methoxyphenyl)fulvene resp. (2a, b) forming [π4 + π2]-cycloadducts of the dihydrobenzodioxin type (4a, b); besides 6,6-dimethyl- and 6,6-pentamethylenefulvene (2c, d) yield dimeric 1:1-adducts (7c, d; 8c, d), which originated from primarily formed [π4 + π6]-cycloadducts of the dihydrobenzo [b]cyclopenta [e] [1·4]dioxepin type (6c
Color Change of Disperse Dyes on Nylon 6 Films with Dye Concentration
作者:Takashi Nakamura、Takao Shibusawa
DOI:10.1177/004051750007000908
日期:2000.9
decreasing Cf. This result is consistent with the sorption behavior of these dyes by nylon6film from water, where the dyes are sorbed by the polymer as two distinct species: L—species—dye taken up by the polymer through the Langmuir sorption mechanism, and P—species—dye taken up by Nemst-type partitioning. For both dyes, the relations between C f and the concentrations of species I and II are very
研究了分散染料在尼龙 6 薄膜上的光谱随染料浓度 ( Cf ) 降低的变化。大多数偶氮分散染料的可见光吸收最大值 (λmax) 会随着 C f 的降低而移向更长的波长。对于具有由分子内电荷转移引起的偶极结构的染料,这种转变是显着的。根据麦克雷方程和因子分析,详细分析了 CI 分散橙 3 和 5(实用分散染料)的光谱变化。在低 Cf 范围内,这些染料在胶片上的 λmax 值比 McRae 方程估计的波长长得多,并且随着温度的升高而转移到更短的波长。因子分析结果表明,随着 Cf 降低,染色薄膜的可见吸收光谱可以描述为两个不同光谱的总和,指定为物种 I 和 II。物种 I 在比物种 II 更长的波长处具有 λmax。[species I]/[species II] 的比率随着 C f 的减小而增加,导致 λmax 随着 Cf 的减小而发生红移。该结果与尼龙 6 薄膜对水中的这些染料的吸附行为一致
Facile Benzylic Alkylation of Arenes with Alcohols by Catalysis with Spirocyclic NHC Ir
<sup>III</sup>
Pincer Complex
A facile IrIII-catalyzed benzylicalkylation of arenes with alcohols has been accomplished via borrowing hydrogen (BH) pathways, and the newly developed spirocyclic NHC IrIII pincer complex (Cat A) serves as an efficient catalyst for this atom-economical and greener transformation. Some drug or bioactive molecules and functional material templates can be easily constructed by this strategy.
通过借氢 (BH) 途径实现了一种简单的 Ir III催化的芳烃与醇的苄基烷基化,新开发的螺环 NHC Ir III钳形配合物 (Cat A) 可作为这种原子经济和绿色转化的有效催化剂. 一些药物或生物活性分子和功能材料模板可以通过这种策略轻松构建。