Simple, Convenient, and Efficient Synthesis of 2-Aryl-substituted Benzo[b]furans
作者:Yong Jiang、Botao Gao、Wenjuan Huang、Yongmin Liang、Guosheng Huang、Yongxiang Ma
DOI:10.1080/00397910701860323
日期:2008.12.31
convenient, and efficient one-pot method for the preparation of benzofuran is reported. Sonogashira coupling reaction of aryl iodides with 2-methyl-3-butyn-2-ol was used as an acetylene source in the presence of Pd(PPh3)2Cl2 and CuI. Deprotection of the acetylene moiety in the same pot using a strong base and the second Sonogashira coupling/cyclization of and substituted o-iodophenols led to the formation
Unified syntheses of gramniphenols F and G, cicerfuran, morunigrol C and its derivative
作者:Kongara Damodar、Jin-Kyung Kim、Jong-Gab Jun
DOI:10.1016/j.tetlet.2016.02.006
日期:2016.3
The first syntheses of natural benzofurans, gramniphenols F and G, morunigrol C and its 3′,5′-di-O-methyl analogue along with the synthesis of cicerfuran are achieved by a unified synthetic sequence using 7-hydroxycoumarin, 5-bromoresorcinol, 2,4-dihydroxybenzaldehyde, and sesamol as building blocks. Ramirez gem-dibromoolefination, Miyaura borylation, Suzuki coupling have been successfully exploited
Functional group manoeuvring for tuning stability and reactivity: synthesis of cicerfuran, moracins (D, E, M) and chromene-fused benzofuran-based natural products
作者:Maddali L. N. Rao、Venneti N. Murty、Sachchida Nand
DOI:10.1039/c7ob02459b
日期:——
The protecting group manoeuvring as a strategy was applied in tuning the stability and reactivity of substituted gem-dibromovinylphenols (12a and 22) for the domino synthesis of benzofuran-based natural products. (1–8).
벤조퓨란 화합물인 그람니페놀 F, 그람니페놀 G, 시세르푸란, 모루니그롤 C 및 그 유도체의 합성방법
申请人:Industry Academic Cooperation Foundation, Hallym University 한림대학교 산학협력단(220070195175) BRN ▼221-82-10284
公开号:KR20170023528A
公开(公告)日:2017-03-06
2,4-다이하이드록시벤즈알데하이드, 5-브로모레소르시놀 및 세사몰을 이용하여 천연 벤조퓨란인 그람니페놀 F와 G, 모루니그롤 C와 그 3',5'-다이-O-메틸 유사체 및 시세르푸란을 합성하였다. 본 합성에서는 위치선택적 프레닐화, 라미레즈 gem-다이므로모올레핀화(Ramirez gem-dibromoolefination), 미야우라 붕소화(Miyaura borylation), 스즈키 커플링 반응을 이용하였다. 또한, 이들 화합물의 항염증 효과를 지다당-유도 RAW-264.7 대식세포에서 산화질소 생성 저해실험으로 살펴보았다. 모든 화합물들이 약하거나 보통인 (16~42%) 저해활성을 나타내었고, 세포독성은 없었으며, IC 값은 9.1 to 25.2μM였다.
An environmentallyfriendly one-pot synthesis of 2-arylbenzofurans under ambient temperature has been developed. It features an ortho-hydroxyl group assisted Wittig reaction of substituted salicylaldehyde followed by an in situ oxidative cyclization. Its advantages include readily available and non-hazardous materials, benign reaction conditions (room temperature, green solvent and one-pot manner), easy work-up and high overall yields. Utilizing this methodology, various 2-aryl-benzofurans including four natural products have been synthesized.