78287-35-1

Upstream product

• 122-78-1 phenylacetaldehyde 
• 7689-03-4 camptothecin 
• 60-12-8 2-phenylethanol 
• 835-38-1 1-(2-aminophenyl)-2-phenylethanone 
• 110351-94-5 (4S)-4-ethyl-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione 
• 1589-82-8 phenylmagnesium bromide 
• 1885-29-6 anthranilic acid nitrile 

Downstream Products

• 86639-56-7 (S)-11-Benzyl-4-ethyl-4-hydroxy-6-oxy-1,12-dihydro-4H-2-oxa-6,12a-diaza-dibenzo[b,h]fluorene-3,13-dione 
• 142605-25-2 7-benzyl-10-hydroxy-20(S)-camptothecin 

Relevant academic research and scientific papers

Camptothecin analogs with bulky, hydrophobic substituents at the 7-position via a Grignard reaction

By developing a new synthetic procedure for introduction of side chains onto the camptothecin ring system, we were able to achieve the preparation of a number of analogs bearing bulky, hydrophobic groups directly attached to the 7-position. These include 7-tert-butylcamptothecin, 7-benzylcamptothecin and the corresponding 10,11-methylenedioxycamptothecins. This method involves the reaction of an appropriate orthoaminobenzonitrile with various Grignard reagents to give the corresponding orthoaminoketones. Friedlander condensation of the latter with the key tricyclic ketone leads to 7-substituted camptothecin analogs. We report the activity of these compounds as topoisomerase I poisons and their ability to inhibit growth of selected tumor cell lines.

7-Substituted camptothecin and camptothecin analogs and methods for producing the same

Methods of forming camptothecin compounds which are effective anti-tumor compounds are disclosed. These compounds inhibit the enzyme topoisomerase I and may alkylate DNA of the associated topoisomerase I-DNA cleavable complex.

Chemical modification of an antitumor alkaloid camptothecin: Synthesis and antitumor activity of 7-C-substituted camptothecins

A radical substitution reaction of 20(S)-camptothecin (1) with methanol furnished 7-hydroxymethylcamptothecin (2). Reaction of 1 with primary alcohols higher than methanol gave 7-alkylcamptothecins (4), of which alkyl groups were one carbon less than the alcohols used and also 7-hydroxyalkylcamptothecins (5). For the preparation of 7-alkylcamptothecin (4), aldehydes were used as a radical source and several alkylated derivatives were synthesized. 7-Acyloxymethyl derivatives (6), 7-carbaldehyde (7), iminomethyl derivatives (10), acid (11), esters (12) and amides (13) were synthesized starting from 2. 7-Ethyl- (4b) and 7-propylcamptothecin (4c), acyloxymethyl compounds 6a, 6c and ethyl ester (12b) exhibited higher antitumor activity than 1 against L1210 in mice.