The Diels–Alder ("DA") reaction is so familiar to organic chemists that the retro-Diels–Alder or retro-diene reaction (hereafter "rDA") requires no conceptual introduction. However, a working definition is needed to indicate the coverage of this review. The intent is to include all reported...
Diels-Alder(DA)反应及其逆反应(Retro-Diels-Alder)是重要和基础的碳碳键生成与裂解方法:1928年Diels和Alder报道了之后以他们名字命名的Diels-Alder反应(获1950年诺贝尔化学奖),随后Woodward和Hoffmann等人以此为基础发展了可以解释反应性和选择性的Woodward–Hoffmann规则(获1981年诺贝尔化学奖),上世纪八九十年代出现的...
百年反应新突破:首例金属杂Retro-Diels-Alder反应 近日,西北大学化学与材料科学学院关正辉教授团队在对烯烃羰基化活性催化剂的深入研究基础上,设计并实现了第一例金属杂六元环的Retro-Diels-Alder反应。研究成果以“C(alkyl)–C(vinyl) bond cleavage enabled by Retro-Pallada-Diels-Alder reaction”为题在线发表于《...
An initiator with Diels–Alder (DA) adduct structure was applied to prepare the polyelectrolyte-carboxylated poly(OEGMA-r-HEMA), so that the force could trigger the retro DA reaction. The reaction was monitored in real time by quartz crystal microbalance and confirmed with atomic force microscopy ...
计算表明Path I路径总体能垒高达76.2 kcal/mol;Path II中六元Pd(IV)环的逆DA-反应的能垒为35.7 kcal/mol但总体能垒仍高达55.7 kcal/mol;Path III中六元Pd(IV)环的逆DA-反应能垒为29.6 kcal/mol,整体能垒也较低。反应可能经历了Path III(蓝色途径)。
M Ito,A Kodama,K Tsukida,... - 《Symposium on the Chemistry of Natural Products Symposium Papers》 被引量: 0发表: 1980年 ChemInform Abstract: RETRO-ALDOL REACTION OF RETINYLIDENE-1,3-DIKETONES; CORRELATION WITH BIOLOGICAL ACTIVITY Retro-γ-retinal, possessing the dissected diene and trienal gr...
Diels-Alder reaction (redirected fromRetro-Diels-Alder reaction) Encyclopedia (ˈdiːlzˈɔːldə) n (Chemistry)chema type of chemical reaction in which one organic compound containing conjugated double bonds adds to another containing an ethylenic bond to form a product containing a ring...
Retro-Diels-Alder反应是实现碳-碳键活化的重要途径之一。然而,相对于Diels-Alder反应在碳-碳键构建中的广泛研究和应用,Retro-Diels-Alder反应在碳-碳键裂解中的研究和应用较具挑战。自1989年以来以含铬、钯和铑的金属杂双烯体为底物的Die...
The retro-Diels鈥揂lder (retro-DA) pathway yields cyclopentadiene and acetylene through a nearly synchronous transition state structure (Sy= 0.97). The other two reaction channels are stepwise with a common step with the formation of the intermediate bicyclo[4.1.0] heptadiene. This reaction is ...
“A true fighter, Chadwick persevered through it all, and brought you many of the films you have come to love so much,” his family said. “From Marshall to Da 5 Bloods, August Wilson’s Ma Rainey’s Black Bottom and several more – all were filmed during and between countless surgeri...