1. Hzddd and J. =. , Hz, H-5), 3.61 (s, 3H, )CH 3 ), 1.33 (s, 9H, C(CH 3 ) 3 ), pp.20-24

1. Dd, 1. , 1. , and J. =. , 25 (s, 1H, H-1), 5.59 (br s, 1H, NH), NMR (CDCl 3 , 400 MHz) ? 7.58, pp.41-45

1. Dd, 1. , 1. , and J. =. , 53 (s, 1H, H-1), 5.91 (br s, 1H, Hz, Har), vol.74969, issue.3, pp.2-2436

1. , N. Tdd, 1. , and J. =. , 95 (s, 1H, H-1), 5, NMR (CDCl 3 , 400 MHz) ? 6 3 ), 1.98 (s, 3H, C(O)CH 3 ), pp.80-86

1. Dd and J. =. , 4-chloro-indan-1,1-dicarboxylic acid diethyl ester 2, p.319022

1. , 1. =br-t, 1. , 1. , 3. et al., 88 (s, 3H, OCH 3 ), 3.85 (s, 3H, OCH 3, NMR (CDCl 3 , 400 MHz) ? 7 5.3 Hz, NH), 4.22 (q, 2H, J = 7.1 Hz, p.903570179222

. Hz, 43 (s, 3H, H-5), 2.15 (s, 3H, p.94

H. Hz, 88 (s, 3H, OCH 3 ), 3.71 (s, 3H, OCH 3 ), 3.63-3.58 (m, 2H, H-1 & H-2), 3.52 (s, 2H, pp.25-29

. Hz, 43 (dd, 1H, J = 4.1, 13.9 Hz

1. Dd, 1. , 1. , and J. =. , 78 (s, 3H, OCH 3 ), 3.64-3.57 (m, 1H, NMR (CDCl 3 , 400 MHz) ? 7 Hz, Har), 5.60 (br s, 1H, NH), 4.08 (q, 2H, J = 7.1 Hz, OCH 2 ), 4.09 (q, 2H, J = 7.1 Hz, pp.7539-7542

. Ml, Stirring was continued for 4 h. Purification of the crude reaction mixture by flash column chromatography yielded 132 mg (71 %) of compound IV

. Hz, 1.89-1.81 (m, 1H, H-5), 1.68-1.58 (m, pp.31-31