References
- Clark , J. H. 1980 . Chem. Rev. , 80 : 429
- Ando , T. and Yamawaki , J. 1981 . J. Synth. Org. Chem. Jpn. , 39 : 14
- Yamawaki , J. , Kawate , T. , Ando , T. and Hanafusa , T. 1983 . Bull. Chem. Soc. Jpn. , 56 : 1885
- Villemin , D. and Ricard , M. 1984 . Tetrahedron Lett. , 25 ( 10 ) : 1059
- Gao , Y. , Shi , D. Q. , Zhou , L. H. and Dai , G. Y. 1996 . Youji Huaxue(ch) , 16 ( 6 ) : 548
- X-ray analysis of 4a: Empirical formula C18H21ClO4, F.W. 336.81, T=293K, monoclinic, space group P21/a, a=7.587(2)Å, b=11.736(3)Å, c=19.120(7)Å, β=101.30(3)Å, V=1669.5(9)Å3, Z=4, Dc =1.340 g · cm−3, F(000) =712, λ(MoKα)=0.71069Å, μ=2.46cm−1, 6°<2θ<50.0°, R=0.034, Rw=0.042. largest diff. peak 0.18e · Å−3.