Tetrahedron p. 5883 - 5900 (1992)
Update date:2022-08-04
Topics:
Celli, Angela M.
Scotton, Mirella
Sega, Alessandro
The hetero-Diels-Alder reaction of 1-oxabutadienes 1a-c bearing electron-withdrawing groups with ethyl vinyl ether and 2,3-dihydrofuran gave the functionalized 5,6-dihydro-4H-pyrans 2a-c, 4c and 4H-4a,5,6,6a-tetrahydrofuro<2,3-b>pyrans 5a-c and 6c.Cycloadducts 2a and 4c easily rearranged to furo<2,3-b>furans 3a, 3c and 9c and cycloadducts 5a and 6c to difuro<2,3-b:3',4'-d>furans 7a, 7c and 8c.The stereochemistry of the compounds 5c and 7a was determined by single crystal X-ray analysis.Relative configurations of the other compounds were established by nOe data.Some aspects of the reaction mechanisms are discussed. Key Words: furo-furans, furo-pyrans, hetero-Diels-Alder, nOes.
View MoreMTT Pharma & Bio-technology Co.,Ltd(expird)
Contact:+86-21-58407925
Address:Room2019, Building C, Tomson Center, No.158, Zhang Yang Road, Shanghai, China
Contact:+86-512-56795332
Address:No227 Shuanglong Rd, Fenghuang, Zhangjiagang
Wuxi Pharma-Trading Import & Export Co.,Ltd.
Contact:+86-510-82304590 82716390
Address:Room 523,Youzu Alliance Building,No.88 Renmin Zhonglu,Wuxi,Jiangsu,China
Shanghai doly chemical Co.,Ltd
Contact:+86-21-34716221
Address:No.328,WuHe Roard,MinHang,ShangHai China
Shanghai Hanshare Industry Co.,Ltd.
Contact:86 21 20960688
Address:RM902-903,Building E, Wanda Plaza,No.26,Zhoukang Road, Pudong District, Shanghai, China
Doi:10.1016/S0040-4020(01)86311-0
(1993)Doi:10.1021/jo400342y
(2013)Doi:10.1016/j.tet.2013.03.052
(2013)Doi:10.1016/j.catcom.2013.03.012
(2013)Doi:10.1016/j.tet.2013.03.059
(2013)Doi:10.1016/S0040-4039(00)92532-2
(1992)