Synthesis of Potentially Bioactive Heterocycles: Thermal [3,3]Sigmatropic Rearrangement of 4‐(4′‐Aryloxybut‐2′‐ynyloxy)‐6‐methyl‐2‐pyridone
摘要:
Synthesis of a number of hitherto unreported 4-aryloxymethylene-7-methyl-2,3-dihydropyrano[3,2-c]pyridine-5-ones 4a-h have been achieved in moderate yields by the thermal [3,3]sigmatropic rearrangement of 4-(4'-aryloxybut-2'-ynyloxy)-6-methyl-2-pyridone.
Regioselective unusual formation of spirocyclic 4-{3′-benzo(2′,3′-dihydro)furo}-9-methyl-2,3,9-trihydrothiopyrano [2,3-<i>b</i>]indole by acid-catalyzed reaction of enol ethers
作者:K. C. Majumdar、S. Alam、B. Chattopadhyay
DOI:10.1002/jhet.31
日期:2009.1
3′-dihydro)furo}-9-methyl-2,3,9-trihydrothiopyrano[2,3-b]indoles are regioselectively synthesized by treating suitable enol ethers, 4-aryloxymethylene-9-methyl-2,3,9-trihydrothio-pyrano[2,3-b]indoles with H2SO4 in dichloromethane-methanol-water. The substrates for the aforesaid reaction are in turn synthesized by the thio-Claisenrearrangement of 2-(4′-aryloxybut-2′-ynylthio)-1-methylindoles. J. Heterocyclic Chem.
通过处理合适的烯醇醚,区域选择性地合成螺环4- 3'-苯并(2',3'-二氢)呋喃} -9-甲基-2,3,9-三氢噻喃并[2,3- b ]吲哚。在二氯甲烷-甲醇-水中,具有H 2 SO 4的芳氧基亚甲基-9-甲基-2,3,9-三氢硫代吡喃并[2,3- b ]吲哚。上述反应的底物又通过2-(4'-芳氧基丁-2'-炔硫基)-1-甲基吲哚的硫代-克莱森重排而合成。杂环化学杂志,46,62(2009)。
Majumdar, K. C.; Das, D. P.; Jana, G. H., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1994, vol. 33, # 2, p. 120 - 124
作者:Majumdar, K. C.、Das, D. P.、Jana, G. H.、Khan, A. T.
DOI:——
日期:——
Majumdar; Das; Chattopadhyay, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 8, p. 1337 - 1342
作者:Majumdar、Das、Chattopadhyay
DOI:——
日期:——
Miumdar K. C., Das D. P., Jana G. H., Khan A. T., Indian J. Chem. B, 33 (1994) N 2, S 120-124
作者:Miumdar K. C., Das D. P., Jana G. H., Khan A. T.