in the 1H-NMR spectra was indicative of these structures. α-Face addition took place in the case of morphinan dienes with opened ring E, and a by-product was formed due to the SE reaction of PTAD with the adducts. The structure of these derivatives was confirmed by means of NMR spectroscopic methods. The retro Diels-Alder (rDA) reaction of the adducts 4a and 4b readily took place in polar-aprotic solvents
各种吗啡喃二烯的反应,例如蒂巴因(1a),N-脱甲基-N-甲酰基蒂巴因(1b),6-脱甲氧基蒂巴因(1c),β-二氢蒂巴因(2a),4-乙酰氧基-β-二氢蒂巴因(2b),7-具有4-苯基-4 H -1,2,4-三唑啉-3,5-二酮(PTAD)的氯-6-脱甲氧基蒂巴因(3a)和7-溴-6-脱甲氧基蒂巴因(3b)产生了新的Diels-Alder (DA)加合物。1a,1b和1c与PTAD的DA反应导致二烯体在二烯单元的β面攻击产物。在W耦合(4 Ĵ 5β,181 H-NMR光谱中的1)表明这些结构。α-FACE除了发生在与开环E吗啡喃二烯的情况下,和一个副产物形成,由于在S È PTAD与加合物反应。这些衍生物的结构通过NMR光谱法确认。加成物4a和4b的逆Diels-Alder(rDA)反应易于在极性低的非质子传递溶剂中,在具有低亲核特性的碱存在下进行。
Schmid; Karrer, Helvetica Chimica Acta, 1950, vol. 33, p. 866,869
作者:Schmid、Karrer
DOI:——
日期:——
Schulz, E. E.; Malikova, T. Sh.; Sharifgaliev, I. A., Russian Journal of Organic Chemistry, 1993, vol. 29, # 5.1, p. 776 - 780
作者:Schulz, E. E.、Malikova, T. Sh.、Sharifgaliev, I. A.、Spirikhin, L. V.、Tolstikov, G. A.
DOI:——
日期:——
Novel opiates and antagonists. Part 7. Diels-Alder reaction of .beta.-dihydrothebaine and its 4-phenyl ether with methyl vinyl ketone: synthesis of 6,14-exo-ethenomorphinans
作者:Anil C. Ghosh、David E. Portlock、Haldean C. Dalzell、Cecil Malmberg、Patricia Herlihy、Raj K. Razdan、William L. Duax、G. David Smith
DOI:10.1021/jo00170a061
日期:1983.11
Linders, J. T. M.; Adriaansens, R. J. O.; Lie, T. S., Recueil des Travaux Chimiques des Pays-Bas, 1986, vol. 105, # 1, p. 27 - 29
作者:Linders, J. T. M.、Adriaansens, R. J. O.、Lie, T. S.、Maat, L.