名称:
Synthesis of Deoxyadenosine 3‘-Phosphates Bearing Cis and Trans Adducts of 7β,8α-Dihydroxy-9α,10α-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene: Standards for 32P-Postlabeling Assays
摘要:
Deoxyadenosine 3'-phosphates bearing cis and trans N-6 adducts of (7R) and (7S)-anti 7 beta,8 alpha-dihydroxy-9 alpha,10 alpha-epoxy-7,8,9, 10-tetrahydrobenzo[alpha]pyrenes have been prepared in good yield by reaction of 6-fluoropurinyl 2'-deoxyriboside 3'-(bis(2-[4-nitrophenyl]ethyl)phosphate with the (+/-)(7 beta,8 alpha,9 alpha,10 beta)- and (+/-)-(7 beta,8 alpha,9 alpha,10 alpha)-10-amino-7,8,9,10-tetrahydrobenzo[alpha]pyrene-7,8,9-triols. The protected phosphates are easily prepared as diasteromeric mixtures, readily resolved by reversed phase HPLC, and efficiently deprotected with DBU to give the adducted S'-phosphates. These nucleotides are of value as standards for the P-32-postlabeling procedure of Randerath for determination of benzo[alpha]pyrene adducts in DNA (Reddy et al. Carcinogenesis 1984, 5, 231).