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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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TL;DR: In this paper, NBDA is used to describe the NBDA and NBDA NBDA's NBDA-NBD-1 NBDA2 NBDA3 NBDA4 NBDA5 NBDANBDA-NBDA6 NBDA
Abstract: 主鎖にノルボルナジエン (NBD) 構造を有する光エネルギー変換・蓄積機能を有するポリエステルの合成について検討を行った. 2, 5-ノルボルナジエン-2, 3-ジカルボン酸無水物 (NBDA) とフェニルグリシジルエーテルとの開環共重合を, 触媒として二塩化スズを用い, 室温で3日間行った結果, 数平均分子量3500程度の主鎖にNBD構造を有するポリエステルが高収率で得られた. さらに, NBDAと種々のエポキシ化合物との開環共重合を行い, 対応するポリエステル類が得られた. これらポリマーのフィルムを光照射するといずれも約7時間でほぼ定量的にNBD残基からクワドリシクラン残基へと光原子価異性化反応が進行した. この光反応は4, 4′-ビス (ジエチルアミノ) ベンゾフェノンの添加で増感された. 光照射後のポリマーの蓄熱量は70～79kJ/mol程度であることが明らかにされた.
4 citations
4 citations
TL;DR: In this article, the products of addition of thioacetic acid to norbornadiene, and of tributyltin hydride and triphenyltin hyddride reduction of exo-2-bromo- anti-7-thioacetoxynorborn-5-ene (7), and trans-5bromoi-3- thioacetioxynortricyclene (8), have been examined.
Abstract: The products of addition of thioacetic acid to norbornadiene, and of tributyltin hydride and triphenyltin hydride reduction of exo-2-bromo- anti-7-thioacetoxynorborn-5-ene (7), and trans-5-bromo-3- thioacetoxynortricyclene (8), have been examined. In contrast to results obtained with the corresponding acetoxy compounds, the product ratios vary with the reducing reagent and the starting material and the ratio of (rate of rearrangement)/(rate of hydrogen atom abstraction) is significantly less for the thioacetoxy substituted radicals.
4 citations
TL;DR: In this article, 1,3,4,9-Tetraphenylbenz[f]inden-2-one (37) was generated by reaction of its dibromide (10; X = O, Y = Br) with sodium iodide.
Abstract: 1,3-Diphenylbenz[f]inden-2-one (8) can be reversibly generated by thermolysis of its formal (π4s+π4s)-dimer (11) which is itself available in 5 steps from benz[f]indan-1,3-dione; (8) adds stereospecifically to cis- and trans-but-2-ene. Photodecarbonylation of the adducts (23), (21), and (22) derived by trapping (8) with norbornadiene, trimethylmaleimide, and the dienophile (24) gives the sterically stabilised 2,3-naphthoquinodimethanes (29), (25), and (26) respectively. These are long-lived in fluid solution at 20 °C and were characterised by u.v.–visible spectroscopy and as their adducts with 4-phenyltriazoline-3,5-dione (PTD). 1,3,4,9-Tetraphenylbenz[f]inden-2-one (37) generated by reaction of its dibromide (10; X = O, Y = Br) with sodium iodide forms the formal (π6s)+π6s)-dimer (35). Dissociation of (35) in the presence of N-phenylmaleimide gives the adduct (15).
4 citations
TL;DR: Polar addition of HN3 to norbornadiene affords exo-5-azido-norbornene and subsequent azidomercuration-demercuration of 2 proceeds stereospecifically to afford ex-2,exo- 5-diazidonorbornane.
4 citations