Synthesis of 26,27-dialkyl analogues of 1.ALPHA.,25-dihydroxyvitamin D3.
作者:TADASHI EGUCHI、HIROSHI SAI、SUGURU TAKATSUTO、NORIYUKI HARA、NOBUO IKEKAWA
DOI:10.1248/cpb.36.2303
日期:——
1α, 25-Dihydroxy-26, 27-dimethylvitamin D3 (5), 1α, 25-dihydroxy-26, 27-diethlvitamin D3 (6), 25-hydroxy-26, 27-dimethylvitamin D3 (7), and 1α-hydroxy-26, 27-dimethylvitamin D3 (8), as dialkyl analogues of 1α, 25-dihydroxyvitamin D3 (1), were synthesized starting from 3β-hydroxy-cholenic acid (9). When tested for ability to increase serum calcium concentration in rats, 5 was slightly less active than 1, whereas 6 was much less active. Compound 8 was less active than 1α-hydroxyvitamin D3. In test for ability to induce cell differentiation of HL-60, 5 was 2.5 times and 6 was 12.5 times more active than 1.
1α, 25-二羟基-26, 27-二甲基维生素D3 (5)、1α, 25-二羟基-26, 27-二乙基维生素D3 (6)、25-羟基-26, 27-二甲基维生素D3 (7) 和1α-羟基-26, 27-二甲基维生素D3 (8)作为1α, 25-二羟基维生素D3 (1) 的二烷基类似物,以3β-羟基-胆酸 (9) 为起始物合成。当在大鼠中测试其增加血清钙浓度的能力时,5的活性略低于1,而6的活性则显著低。化合物8的活性低于1α-羟基维生素D3。在诱导HL-60细胞分化的测试中,5的活性是1的2.5倍,而6是1的12.5倍。