the active pharmaceutical ingredient for clinical trials, exploring enzymatic and microbial methods to produce chiral building blocks on a multi‐kilogram scale. The three building blocks were identified as key intermediates in the synthesis and needed to be produced with high optical purity in yields higher than those previously published. The improved syntheses of two of these building blocks are
GIERSCH, WOLFGANG;SCHULTE-ELTE, KARL H., HELV. CHIM. ACTA, 73,(1990) N, C. 733-738
作者:GIERSCH, WOLFGANG、SCHULTE-ELTE, KARL H.
DOI:——
日期:——
Enantiomeric 3,7-Dimethylocta-1,7-dienes as Useful Chiral Building Blocks. A New Access to Both Optical Antipodes of Natural (E)-3,7-Dimethyloct-2-ene-1,8-diol and (E)-3,7-Dimethyloct-2-ene-1,8-dicarboxylic Acid
作者:Wolfgang Giersch、Karl H. Schulte-Elte
DOI:10.1002/hlca.19900730322
日期:1990.5.2
Ozonolysis of the easily available monoterpenoids (−)-1 and (+)-1 leads in high yield to the ketoaldehydes (−)-4 and (+)-4, which serve as convenient intermediates for efficient new routes to both optical antipodes of the naturally occurring octenediol (E)-2 (Monarch butterfly secretion product) and octene-dicarboxylic acid (E)-3 (Callosobruchus chinensis sex pheromone). All steps proceed with almost