Synthesis method and intermediates useful in the preparation of pyrrolobenzodiazepines
申请人:SPIROGEN SÀRL
公开号:US09102704B2
公开(公告)日:2015-08-11
A compound of formula I wherein: R7 is selected from: ORA, where RA is selected from C1-4 saturated alkyl, optionally substituted by phenyl, which may bear a chloro substituent, pyridyl and furanyl; chloro; NH2; —CH2—O—C(═O)Me; R8 is OProto, where Proto is a silicon-based oxygen protecting group orthogonal to Rc; R9 is selected from H, methyl and methoxy; Rs is selected from CF3, (CF2)3CF3, CH3 and (formula 2) and Rc is selected from: (i) C(═O)—ORC1, where RC1 is a saturated C1-4 alkyl group; (ii) —CH2—O—C(═O)RC2, where RC2 is methyl or phenyl; (iii) CH2—O—Si—(RSi1)(RSi2)(RSi3), where RSi1, RSi2, RSi3 are independently selected from C1-6 a saturated alkyl group and a phenyl group; and (iv) C(—YRC3)(—YRC4) where each Y is independently O or S, and where RC3 and RC4 are independently a saturated C1-4 alkyl group, or together form a C2-3 alkylene.
化合物I的化学式为:其中R7选自:ORA,其中RA选自C1-4饱和烷基,可选地被苯基取代,该苯基可能带有氯代取代基,吡啶基和呋喃基; 氯; NH2; -CH2-O-C(═O)Me; R8为OProto,其中Proto是基于硅的氧保护基,与Rc正交; R9选自H,甲基和甲氧基; Rs选自CF3,(CF2)3CF3,CH3和(公式2),Rc选自:(i)C(═O)-ORC1,其中RC1是饱和的C1-4烷基; (ii)-CH2-O-C(═O)RC2,其中RC2为甲基或苯基; (iii)CH2-O-Si-(RSi1)(RSi2)(RSi3),其中RSi1,RSi2,RSi3分别选自C1-6饱和烷基和苯基; 和(iv)C(-YRC3)(-YRC4),其中每个Y独立地为O或S,其中RC3和RC4分别为饱和的C1-4烷基,或者一起形成C2-3亚基。