An efficient synthesis of naturally occurring and biologically active furonaphthoquinones is described starting from suitably substituted dihydronaphthofurans.
ortho-Carbonylarylacetylenols have been employed for the synthesis of dihydronaphthofurans via AgTFA-catalyzed annulation reaction. A broad range of substrates both ortho-keto- and ortho-formylarylacetylenols could be employed in this transformation providing the desired products in good yields. However, the reaction pathways of these two substrates are different. The reaction of the ketone precursors could directly
FUSED HETEROCYCLIC COMPOUNDS AND THROMBOPOIETIN RECEPTOR ACTIVATORS
申请人:Shigeta Yukihiro
公开号:US20120209005A1
公开(公告)日:2012-08-16
Fused heterocyclic compounds useful for prevention, treatment or improvement of diseases against which activation of the thrombopoietin receptor is effective are provided.
A compound represented by the formula (I) (wherein R
1
is an aryl group fused to a saturated ring or the like, A, B, L
1
, R
2
, L
2
, L
3
, Y, L
4
, R
3
and X are defined in the description), a tautomer, prodrug or a pharmaceutically acceptable salt of the compound or a solvate thereof.
Gold-Catalyzed Cascade Annulations of 2-(Ynol)aryl Aldehydes: Facile Synthesis of Benzochromanes and Benzobicyclo[<i>n</i>.3.1]acetals
作者:Le-Ping Liu、Gerald B. Hammond
DOI:10.1021/ol101985d
日期:2010.10.15
Gold-catalyzed reactions of 2-(ynol)aryl aldehydes were investigated. Benzochromanes were obtained from the reaction when AuCl3 was employed as the catalyst, whereas benzobicyclo[n.3.1]acetals were produced when triazole−gold was employed as the catalyst. Plausible mechanisms are discussed.
研究了金催化的2-(ynol)芳基醛的反应。当使用AuCl 3作为催化剂时,从反应中获得苯并二氢吡喃,而当使用三唑-金作为催化剂时,则生成苯并双环[ n .3.1]缩醛。讨论了可能的机制。
Synthesis and chemical transformations of cyclobuta[a]naphthalene and -anthracene derivatives
作者:Eugene Ghera、Rakesh Maurya
DOI:10.1016/s0040-4039(00)95821-0
日期:1987.1
GHERA EUGENE; MAURYA RAKESH, TETRAHEDRON LETT., 28,(1987) N 6, 709-712