描述了广泛的钯催化的芳基和乙烯基卤化物和烯丙基乙酸酯的区域特异性和立体特异性的5-,6-和7-exo-dig单,双和三环化方法。单环和双环化过程终止于从哌啶甲酸或甲酸钠中捕获氢化物。Tl 2 CO 3的添加导致炔-丙二烯异构化,并且在环化之后导致1,3-二烯,这使Diels-Alder加合物具有良好的收率。
A novel method is described for introducing a two-carbon unit at either the 3- or 4-position of the 1-isoquinolone ring. The method for the synthesis of the 4-vinyl or 4-ethynyl derivative of isoquinolone consists of 1) photo-addition of the isoquinolone to chloroethylenes and 2) base treatment of the major (head-to-tail) adduct giving the 4-substituted isoquinolones. Similarly, by using 3-methoxyisoquinolone and vinyl acetate in step 1) and an acidic condition in step 2), a formylmethyl group is introduced into the 3-position of the isoquinolone ring.
A new palladium catalysed-anion capture process is proposed, Examples are provided involving cyclisation of o-(ω-acetylenic)-aryl iodides and 2-bromo-1,6-enynes to heterocyclic- and carbocyclic-vinylpalladium species followed by hydride ion capture.