2-METHYL-2-HEPTEN-6-ON-1-AL ACETALS AND A METHOD FOR THE PRODUCTION OF THESE COMPOUNDS. The acetals are obtained by reacting the acetals of 2-methyl-4-halo-2-buten-1-al with an alkali compound of an ester of acetoacetic acid and eliminating, by means of an alkali, the alkoxycarbonyl group from the intermediate obtained. 2-methyl-2-hepten-6-on-1-al is obtained from the acetals by acid hydrolysis. The products are perfumes having a pleasant fruity odor and are intermediates for advantageous synthesis of the natural orange aromatics and orange odorants .alpha.-sinensal and .beta.-sinensal.
Intermediates and enzymes of the non-mevalonate isoprenoid pathway
申请人:——
公开号:US20040176570A1
公开(公告)日:2004-09-09
The invention provides a protein in a form that is functional for the enzymatic conversion of 2C-methyl-D-erythritol 2,4-cyclodiphosphate to 1-hydroxy-2-methyl-2-butenyl 4-diphosphate notably in its (E)-form of the non-mevalonate biosynthetic pathway to isoprenoids. The invention also provides a protein in a form that is functional for the enzymatic conversion of 1-hydroxy-2-methyl-2butenyl 4-diphosphate, notably in its (E)-form, to isopentenyl diphosphate and/or dimethylallyl diphosphate. Further, screening methods for inhibitors of these proteins are provided. Further, 1-hydroxy-2-methyl-2-butenyl 4-diphosphate is provided and chemical and enzymatic methods of its preparation.