A practical synthesis of the anti-tumour agent 2-methyl-4-deoxyisopicropodophyllotoxin and related podophyllin analogues
摘要:
We describe an efficient, six-stage synthesis of 2-methyl-4-deoxyisopicropodophyllotoxin, which proceeds via a Diels-Alder cycloaddition between 2-methylmaleic anhydride and the orthoquinodimethane generated by treatment of 5-[1-acetoxy-1-(3',4',5'-trimethoxyphenyl)methyl]-6-trimethyl-silylmethyl-1,3-benzodioxole with silica gel at 60-degrees-C. The podophyllin was converted into a number of 4'-ester derivatives. This procedure was also used to prepare a diazapodophyllin via the use of 4-phenyl-1,2,4-triazoline-3,5-dione as dienophile.
A practical synthesis of the anti-tumour agent 2-methyl-4-deoxyisopicropodophyllotoxin and related podophyllin analogues
摘要:
We describe an efficient, six-stage synthesis of 2-methyl-4-deoxyisopicropodophyllotoxin, which proceeds via a Diels-Alder cycloaddition between 2-methylmaleic anhydride and the orthoquinodimethane generated by treatment of 5-[1-acetoxy-1-(3',4',5'-trimethoxyphenyl)methyl]-6-trimethyl-silylmethyl-1,3-benzodioxole with silica gel at 60-degrees-C. The podophyllin was converted into a number of 4'-ester derivatives. This procedure was also used to prepare a diazapodophyllin via the use of 4-phenyl-1,2,4-triazoline-3,5-dione as dienophile.
The synthesis of structural analogues of the podophyllum lignans: selective wittig reactions on 1-aryl-2-methyl-tetrahydronaphthoic acid anhydride
作者:John Mann、Lilan T.F. Wong、Andrew R. Beard
DOI:10.1016/s0040-4039(00)98580-0
日期:1985.1
The title anhydride reacts with stabilised phosphorus ylids exclusively at the carbonyl remote from the 1-aryl substituent. These products have been converted into a variety of compounds related in structure to deoxyisopicrophyllotoxin.