New Dienophiles: 1-Acetylvinyl Arenecarboxylates. Reactivity toward cyclopentadiene and exocyclic dienes
作者:Joaquin Tamariz、Pierre Vogel
DOI:10.1002/hlca.19810640121
日期:1981.2.4
these dienophiles toward cyclopentadiene is evaluated and compared with that of methyl vinylketone, 3-trimethylsilyloxy-, 3-ethoxy- and 3-acetoxy-3-buten-2-ones. The stereoselectivity of the cycloadditions of these dienophiles with 2,3,5,6-tetramethylidene-7-oxanorbornane (1) and 5,8-dimethoxy-1,4-epoxy-2,3-dimethylidene-1,2,3,4-tetrahydroanthracene (2) is studied. In principle, the dienophiles 3 allow
描述了1-乙酰乙烯基芳烃羧酸盐H 2 C = C(COCH 3)OCOR的制备,其中R =苯基,对硝基苯基,2,4-二硝基苯基,α-和β-萘基(3)。评估了这些亲二烯体对环戊二烯的Diels-Alder反应性,并将其与甲基乙烯基酮,3-三甲基甲硅烷基氧基-,3-乙氧基-和3-乙酰氧基-3-丁烯-2-酮的反应进行了比较。这些亲二烯体与2,3,5,6-四亚甲基-7-氧杂硼烷(1)和5,8-二甲氧基-1,4-环氧-2,3-二甲基-1,2,3的环加成反应的立体选择性,研究了4-四氢蒽(2)。原则上,双亲物3允许Diels-Alder加成到环外二烯(例如1和2)的Diels-Alder中,将道诺维素类似物A环的位置C(9)直接官能化。