Imidazole derivatives of the formula: ##STR1## wherein R.sub.1 is an (R)- or (S)-1-phenylalkyl group, an (R)- or (S)-1-alkoxycarbonyl-1-phenylmethyl group or an (R)- or (S)-1-aryloxycarbonyl-1-phenylmethyl group, R.sub.2 is hydrogen, a substituted or unsubstituted alkanoyl group, a substituted or unsubstituted benzoyl group, a substituted or unsubstituted benzyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkoxyalkyl group, a pyranyl group, a substituted or unsubstituted benzenesulfonyl group, an alkylsufonyl group, a diarylphosphinyl group, a dialkoxyphosphinyl group or a trialkylsilyl group, and A is a sulfur or oxygen atom. The imidazole derivatives are intermediate products for the production of (+) biotin.
配方为:##STR1## 的
咪唑衍
生物,其中R.sub.1是(R)-或(S)-1-苯基烷基,(R)-或(S)-1-烷氧羰基-1-苯甲基,或(R)-或(S)-1-芳氧羰基-1-苯甲基。R.sub.2是氢,取代或未取代的烷酰基,取代或未取代的苯甲酰基,取代或未取代的苯甲基,烷氧羰基,芳氧羰基,烷氧基烷基,
吡喃基,取代或未取代的苯磺酰基,烷基磺酰基,二芳基膦基,二烷氧基膦基或三烷基
硅基,而A是
硫或氧原子。
咪唑衍
生物是生产(+)
生物素的中间产物。