中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(S)-2,2,3-三甲基环戊-3-烯-1-乙醛 | (S)-campholenic aldehyde | 23727-15-3 | C10H16O | 152.236 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (+)-campholenol | 36789-58-9 | C10H18O | 154.252 |
—— | 2-((S)-2,2,3-Trimethyl-cyclopent-3-enyl)-acetamide | 100905-51-9 | C10H17NO | 167.251 |
—— | (1R,5R)-7,8,8-trimethylbicyclo[3.3.0]oct-6-en-3-one | 908298-81-7 | C11H16O | 164.247 |
Three sesquiterpenes of the zizaane family, khusimone (1), epizizanoic acid (3), and zizanoic acid (2) have been synthesized in optically active form from the ammonium salt of (−)-l-10-camphorsulfonic acid in sixteen, nineteen, and twenty steps respectively.
Inhibiting tyrosyl-DNA phosphodiesterase 1 (TDP1) is a promising strategy for increasing the effectiveness of existing antitumor therapy since it can remove the DNA lesions caused by anticancer drugs, which form covalent complexes with topoisomerase 1 (TOP1). Here, new adamantane–monoterpene conjugates with a 1,2,4-triazole or 1,3,4-thiadiazole linker core were synthesized, where (+)-and (−)-campholenic and (+)-camphor derivatives were used as monoterpene fragments. The campholenic derivatives 14a–14b and 15a–b showed activity against TDP1 at a low micromolar range with IC50 ~5–6 μM, whereas camphor-containing compounds 16 and 17 were ineffective. Surprisingly, all the compounds synthesized demonstrated a clear synergy with topotecan, a TOP1 poison, regardless of their ability to inhibit TDP1. These findings imply that different pathways of enhancing topotecan toxicity other than the inhibition of TDP1 can be realized.