申请人:University of Pittsburgh
公开号:US07321046B2
公开(公告)日:2008-01-22
Dictyostatin and its analogs show great promise as new anticancer agents. The present invention provides dictyostatin analogs, synthetic intermediates for the synthesis of dictyostatin analogs, and synthetic methods for the synthesis of such analogs and intermediates. Dictyostatin analogs can have the following structure or its enantiomer
wherein R1 is H, an alkyl group, an aryl group, an alkenyl group, an alkynyl group, or a halogen atom; R2 is H, a protecting group, an alkyl group, a benzyl group, a trityl group, —SiRaRbRc, CH2ORd, or CORe; Ra, Rb and Rc are independently an alkyl group or an aryl group; Rd is an alkyl group, an aryl group, an alkoxylalkyl group, —RiSiRaRbRc or a benzyl group, wherein Ri is an alkylene group; Re is an alkyl group, an allyl group, a benzyl group, an aryl group, an alkoxy group, or —NRgRh, wherein Rg and Rh are independently H, an alkyl group or an aryl group; R3 is (CH2)n where n is and integer in the range of 0 to 5, —CH2CH(CH3)—, —CH═CH—, —CH═C(CH3)—, or —C≡C—; R4 is
wherein R23a is H, a protecting group, an alkyl group, a benzyl group, a trityl group, —SiRaRbRc, CH2ORd, or CORe; R23b is H, a protecting group, an alkyl group, a benzyl group, a trityl group, —SiRaRbRc, CH2ORd, or CORe, or R23a and R23b together form a portion of six-membered acetal ring incorporating CRtRu; Rt and Ru are independently H, an alkyl group, an aryl group or an alkoxyaryl group; and R5 is H or OR2b, wherein R2b is H, a protecting group, an alkyl group, an aryl group, a benzyl group, a trityl group, —SiRaRbRc, CH2ORd, or CORe; provided that the compound is not dictyostatin 1.
Dictyostatin及其类似物作为新的抗癌剂具有巨大的潜力。本发明提供Dictyostatin类似物,用于合成Dictyostatin类似物的合成中间体以及用于合成此类类似物和中间体的合成方法。Dictyostatin类似物可以具有以下结构或其对映体,其中R1为H,烷基,芳基,烯基,炔基或卤素原子;R2为H,保护基,烷基,苄基,三苯甲基,-SiRaRbRc, ORd或CORe; Ra,Rb和Rc独立地为烷基或芳基;Rd为烷基,芳基,烷氧基烷基,-RiSiRaRbRc或苄基,其中Ri为烷基;Re为烷基,烯丙基,苄基,芳基,烷氧基或-NRgRh,其中Rg和Rh独立地为H,烷基或芳基;R3为(
CH2)n,其中n为0到5之间的整数,- CH(
CH3)-,-CH═CH-,-CH═C( )-或-C≡C-; R4为其中R23a为H,保护基,烷基,苄基,三苯甲基,-SiRaRbRc, ORd或CORe;R23b为H,保护基,烷基,苄基,三苯甲基,-SiRaRbRc, ORd或CORe,或R23a和R23b一起形成包含CRtRu的六元
缩醛环的一部分;Rt和Ru独立地为H,烷基,芳基或烷氧基芳基;R5为H或OR2b,其中R2b为H,保护基,烷基,芳基,苄基,三苯甲基,-SiRaRbRc, ORd或CORe;但化合物不为Dictyostatin 1。