138768-43-1

Basic information

• Product Name: Ethyl E-6-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-4-methyl-4-hexenoate
• Synonyms: Ethyl E-6-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-4-methyl-4-hexenoate
• CAS NO: 138768-43-1
• Molecular Weight: 462.659
• Mol File: 138768-43-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Ethyl E-6-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-4-methyl-4-hexenoate(CAS DataBase Reference)
• NIST Chemistry Reference: Ethyl E-6-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-4-methyl-4-hexenoate(138768-43-1)
• EPA Substance Registry System: Ethyl E-6-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-4-methyl-4-hexenoate(138768-43-1)

Safety Data

• Hazardous Substances Data: 138768-43-1(Hazardous Substances Data)

Upstream product

• 138768-42-0 (+/-)-4-<1,3-Dihydro-4-(tert-butyldimethylsilyloxy)-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl>-3-hydroxy-2-methylbutene 
• 78-39-7 Triethyl orthoacetate 

Downstream Products

• 24280-93-1 mycophenolic acid 
• 32483-51-5 ethyl (E)-6-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1H-isobenzofuran-5-yl)-4-methylhex-4-enoate 

Relevant articles and documents

The synthesis of mycophenolic acid

A new synthesis of mycophenolic acid 1, has been accomplished using silyloxy-1,3-cyclohexadiene 9 which undergoes cycloaddition to dimethyl acetylenedicarboxylate and subsequent elimination of ethylene (Alder-Rickert reaction) to give the trisubstituted dimethyl phthalate 11. After conversion of 11 to phthalide 16, the (E)-4-methyl-4-hexenoic acid side-chain was constructed via an orthoester Claisen rearrangement using allylic alcohol 19 and triethyl orthoacetate.