Tricyclic lactones for treatment of cancer
A carbocyclic and heterocyclic technology, applied in the field of new tricyclic compounds, can solve the problems of low activity and no activity
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[0162] The final compound of formula (II) can be prepared via the electron enriched double bond of intermediate (III) using mCPBA, dimethyldioxirane, trifluoromethyldioxirane, peracid or similar obtained by regioselective and stereoselective epoxidation.
[0163] Process for the preparation of final compounds of formula (I) by lactonization (Scheme 2)
[0164] Methods of preparation of final compounds of formula (I) by lactonization (Scheme2)
[0165]
[0166] Scheme 2: Example of a non-limiting method for the preparation of the final compound of formula (I) as disclosed herein by hydrolysis and lactonization of the compound of formula (II) as disclosed herein.
[0167] Ester hydrolysis of (II) under basic or acidic conditions, followed by acid-catalyzed epoxide opening and subsequent lactonization yields the final lactone compound (I).
[0168] Preparation of tetrahydroindene intermediates of formula (III) via intermolecular [4+2]vinyl allene Diels-Alder cyclization ...
Embodiment 1
[0227] 2a1-Hydroxy-4,7,7-trimethyl-4,5,5a,6,7,7a-hexahydroindeno[1,7-bc]furan-2(2a1H)-one
[0228]
[0229] 1 H NMR (CDCl 3 )6.91(1H,d,J=3.8Hz),4.30(1H,s),2.49(1H,m),2.43(1H,m),2.11(1H,m),1.87(1H,ddd,J=14.6 , 6.5 and 2.4Hz), 1.63 (1H, dd, J = 10.0 and 4.2Hz), 1.57 (1H, dd, J = 10.2 and 4.1Hz), 1.45 (1H, dd, J = 13.2 and 6.9Hz), 1.22 (3H,d,J=7.2Hz),1.17(3H,s),0.91(3H,s)
[0230] 13 C NMR (CDCl 3 ) 170.1, 146.8, 128.7, 107.2, 95.3, 80.5, 41.9, 39.9, 39.1, 30.0, 29.3, 28.0, 24.7, 19.8
[0231] HRMS C 13 h 19 o 3 [M+1] Calculated: 223.1334, Measured: 223.1345
Embodiment 2
[0233] 2a 1 -Hydroxy-4-methyl-7-phenyl-4,5,5a,6,7,7a-hexahydroindeno[1,7-bc]furan-2(2a 1 H)-keto
[0234]
[0235] 1 H NMR (CDCl 3 )7.31(2H,m),7.22(1H,m),7.06(2H,d,J=7.3Hz),7.01(1H,d,J=3.9Hz),4.93(1H,d,J=8.5Hz) ,3.53(1H,dt,J=12.5 and 7.9Hz),2.56(1H,m),2.50(1H,m),2.00(2H,m),1.73(1H,ddd,J=14.3,10.0 and 4.3Hz ),1.60(1H,q,J=12.5Hz),1.27(3H,d,J=7.2Hz)
[0236] 13 C NMR (CDCl 3 ) 170.1, 147.2, 137.1, 128.9, 128.8, 128.6, 127.2, 88.9, 82.8, 80.1, 47.4, 41.1, 33.7, 29.6, 27.9, 19.9
[0237] HRMS C 17 h 18 o 3 Na[M+1] Calculated: 293.1154, Measured: 293.1147
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