REFERENCES
- Caddick , S. 1995 . Tetrahedron , 51 : 10403
- Meuly , W. C. and Boisde , P. M. “ In Kirk-Othmer ” . In Encyclopedia of Chemical Technology , 4th ed. Vol. 7 , 650 – 654 . New York : Wiley-Interscience .
- Casley-Smith , J. R. U.S. Pat. 4,593,041 . (Chem. Abstra. 1986 105, 54623k)
- Elstner , E. F. and Beuscher . N. Ger. Pat. 3,715,990 . (Chem. Abstra. 1989 111 50435b)
- Bogdal , Darek . 1998 . ECHET98: Electron . Conf. Heterocycle Chem. (computer optical disk) , 132 : 383 – 386 . (Chem. Abstra. 2000 107850y)
- Zhang , X.-Y. , Fan , X.-S. and Qiao , R.-Z. 1999 . Lizi JiaoHuan yu Xifu . 15 : 374 (Chem. Abstra. 2000 132 107851z)
- Daqing , S. , Shujiang , T. , Zaisheng , L. , Suhui , W. and Guiyuan , D. 1998 . Synth. Commun. , 28 : 3291
- X-ray analysis of 4a: Empirical formula C23H30NO4, F.W. 384.48, T al; 293(2) K, monoclinic, space group P21, a al; 9.3639(19) Å, b al; 5.9740(12) Å, c al; 15.731(3) Å, α al; 90°, β al; 102.87(3)°, γ al; 90°, V al; 857.9(3) Å3, Z al; 2, Dc al; 1.488 Mg/cm3, λ(M0Kα) al; 0.71073 Å, μ al; 0.101 mm−1, F(000) al; 414. 3.83 < σ < 27.87, R = 0.0805, Rw al; 02441. Largest diff. Peak and hole: 0.469 and − 0.235 e Å−3