An investigation on the reactions of naphtho[b]cyclopropene
作者:Nurullah Saraçolu、Inci Durucasu、Metin Balci
DOI:10.1016/0040-4020(95)00653-p
日期:1995.10
In order to investigate the reactivity of naphtho[b]cyclopropene (2), the reaction with various dienophiles, dienes and electrophiles was examined. Reaction of 2 with tetracyanoethylene, 4-phenyl-3H-1.2,4-triazole-3,5(4H)-dione, 1,3-diphenylisobenzofuran and benzyne afforded the insertion products 3, 4, 6, 10. Cheletropic addition of dichlorocarbene to 2 gave 1,1-dichloronaphtho[b]cyclobutene (11)
1H-cyclopropa[b]naphthalene reacts with PTAD, tetracyanoethylene (TCNE) and benzyne to afford insertion-products 3, 4, and 5. Cheletropic addition of dichlorocarbene to 2 provides cyclobutanaphthalene 6. Hydrolysis and reductive elimination of 6 result in the formation of 7 and 8.
Synthesis of naphtho[b]cyclobutenes from 1,2-bis(3-propynol)benzenes
作者:Shinji Kitagaki、Yuki Okumura、Chisato Mukai
DOI:10.1016/j.tetlet.2005.12.121
日期:2006.3
We have demonstrated that the reaction of benzene-bridged bis(propargyl alcohol)s with chlorodialkylphosphines exclusively afforded 3,8-bis(dialkylphosphinyl)naphtho[b]cyclobutenes via the [2+2] cycloaddition of 1,2-bis(α-phosphinylallenyl)benzenes. Dephosphinylation of the product has also been achieved.
我们已经证明,苯桥双(炔丙基醇)与氯二烷基膦的反应通过1,2-双(α-)的[2 + 2]环加成反应独家提供了3,8-双(二烷基次膦基)萘[ b ]环丁烯。膦基烯丙基)苯。还已经实现了产物的去磷酸化。
NEW [2.2]ORTHOCYCLOPHANES AND [2.2]METACYCLOPHANE HAVING SILICON- SILICON BONDS AS BRIDGING UNITS
Four new [2.2]cyclophanes having two silicon-silicon bridges were prepared by the Diels-Alder reaction of 3,3,4,4,7,7,8,8-octamethyl-3,4,7,8-tetrasilacycloocta-1,5-diyne. These novel cyclophanes and two other related compounds are characterized by various spectra.