Aldol Reaction under Solvent-Free Conditions: Highly Stereoselective Synthesis of 1,3-Amino Alcohols
作者:Teck-Peng Loh、Jing-Mei Huang、Swee-Hock Goh、Jagadese J. Vittal
DOI:10.1021/ol000042s
日期:2000.5.1
[formula: see text] A method for the highly stereoselective synthesis of 1,3-aminoalcohols based on the indium trichloride-catalyzed Mukaiyama aldol reaction of keto ester (R,S)-1 under solvent-free conditions has been developed. The high selectivity observed can be explained on the basis of the shielding of one face by a remote substituent.
Asymmetric imine-ene reactions with chiral glyoxylate-derived α-imino esters: An efficient route to asymmetric synthesis of α-amino acids
作者:Koichi Mikami、Masami Kaneko、Tomoko Yajima
DOI:10.1016/s0040-4039(00)74104-9
日期:1993.7
The asymmetric enereactions with α-iminoesters, prepared from (−)-8-phenylmenthyl glyoxylate, are shown to provide an efficient entry to the asymmetric synthesis of α-aminoacids.
The present disclosure provides processes for the preparation of a compound of formula I:
which is useful as an antiviral agent. The disclosure also provides compounds that are synthetic intermediates to compounds of formula I.
Amorphous and crystalline solid forms of the anti-HCV compound (1-3-[6-(9,9-difluoro-7-2-[5-(2-methoxycarbonylamino-3-methyl-butyryl)-5-aza-spiro[2.4]hept-6-yl]-3H-imidazol-4-yl}-9H-fluoren-2-yl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester (Compound I) were prepared and characterized in the solid state:
Also provided are processes of manufacture and methods of using the amorphous and crystalline forms.