申请人:WARNER-LAMBERT COMPANY
公开号:EP0366122A2
公开(公告)日:1990-05-02
Preparation of 4-bromo-4′-demethylepipodophyllotoxin by reacting podophyllotoxin with hydrogen bromide at about -20°C. New antitumor compounds of the formula:
wherein R is A-(CH₂)n[A(CH₂)n]m(CHAH)p-Q or
each A, independently, is O, S, SO or SO₂; n is an integer from 1 to 6, except when n and p, taken together, are zero, then n is 2 to 6; n is 0, 1, or 2; p is 0, 1, or 2; Q is H, alkyl from 1 to 6 carbon atoms which may be substituted with an NR₁R₂ group wherein each R₁ and R₂, independently, is selected from the group of H, alkyl containing 1 to 6 carbon atoms which may be substituted with OH, alkanoyl containing 1 to 6 carbon atoms, or R₁ and R₂ are interconnected and together with the N to which they are connected form an N heterocyclic ring of 5 to 6 carbon atoms; R₃ is hydrogen, and R₄ is an alkyl, alkenyl, cycloalkyl, 2-furyl, 2-thienyl, aryl, aralkyl, and aralkenyl, wherein the aromatic ring may optionally be substituted, preferentially by one or more of hydroxyl, alkyl, alkoxy, nitro, or halogen radicals. R₃ and R₄ together with the carbon atom to which they are attached may form a saturated cycloaliphatic ring having 5 or 6 carbon atoms; each X and Y, individually, is OH or NR₆R₇ wherein R₆ and R₇, independently, is H, alkyl containing 1 to 6 carbon atoms or one of R₆ and R₇ is acyl; and Z is
Novel process for the preparation of the novel compounds or analogs thereof having advantageous stereoselection using alkyltin thiolates, preferably with selected solvents.
在-20°C左右使荚叶肿毒素与
溴化氢反应制备4-
溴-4′-去甲基荚叶肿毒素。式中的新抗肿瘤化合物:
其中 R 是 A-(CH₂)n[A(CH₂)n]m(CHAH)p-Q 或
每个 A 独立地为 O、S、SO 或 SO₂;n 为 1 至 6 的整数,但当 n 和 p 合在一起为零时,n 为 2 至 6;n 为 0、1 或 2;p 为 0、1 或 2;Q 是 H、可被 NR₁R₂ 基团取代的 1 至 6 个碳原子的烷基,其中每个 R₁ 和 R₂ 独立地选自 H、可被 OH 取代的含 1 至 6 个碳原子的烷基、含 1 至 6 个碳原子的烷酰基,或 R₁ 和 R₂ 相互连接并与它们连接的 N 一起形成 5 至 6 个碳原子的 N 杂环;R₃是氢,R₄是烷基、烯基、环烷基、2-
呋喃基、2-
噻吩基、芳基、芳烷基和芳烯基,其中芳环可任选被取代,优选被羟基、烷基、烷氧基、硝基或卤素基中的一个或多个取代。R₃ 和 R₄ 与它们所连接的碳原子一起可形成具有 5 或 6 个碳原子的饱和环脂族环;每个 X 和 Y 单独为 OH 或 NR₆R₇,其中 R₆ 和 R₇ 单独为 H、含 1 至 6 个碳原子的烷基或 R₆ 和 R₇ 中的一个为酰基;而 Z 是
使用烷基
硫醇
锡酸盐(最好使用选定的溶剂)制备具有良好立体选择性的新型化合物或其类似物的新工艺。