A facile synthesis of benzo(b)furan derivatives including naturally occurring neolignans via regioselective lithiation of ortho-cresols using the bis(dimethylamino)phosphoryl group as a directing group.
Substrate-Directed Hydroacylation: Rhodium-Catalyzed Coupling of Vinylphenols and Nonchelating Aldehydes
作者:Stephen K. Murphy、Achim Bruch、Vy M. Dong
DOI:10.1002/anie.201309987
日期:2014.2.24
alkenyl, and alkyl aldehydes to form branched products with high selectivity. This cross‐coupling yields α‐aryl ketones that can be cyclized to benzofurans, and it enables access to eupomatenoid natural products in four steps or less from eugenol. Excellent reactivity and high levels of regioselectivity for the formation of the branched products were observed. We propose that aldehyde decarbonylation
The neolignans (−)-carinatone and carinatin from Virola carinata
作者:Kazuko Kawanishi、Yukiko Uhara、Yohei Hashimoto
DOI:10.1016/0031-9422(82)80095-2
日期:1982.1
Abstract From the bark of Virola carinata two neolignans have been isolated: (−)-carcinatone, [(2 S )-1-(3′,4′-dimethoxyphenyl)-2-(3″-allyl-5″-methoxy-6″-hydroxyphenyl) propanone] and carinatin, [5-allyl-7-methoxy-3-methyl-2-(3′,4′-dimethoxyphenyl)benzofuran].
摘要 从 Virola carinata 的树皮中分离出了两种新木脂素:(-)-carcinatone, [(2 S )-1-(3',4'-dimethoxyphenyl)-2-(3″-allyl-5″-methoxy- 6″-羟基苯基)丙酮]和carinatin,[5-烯丙基-7-甲氧基-3-甲基-2-(3',4'-二甲氧基苯基)苯并呋喃]。
Date, Matsuhiro; Kawanishi, Kenji; Hori, Takako, Chemical and pharmaceutical bulletin, 1989, vol. 37, # 10, p. 2884 - 2886