Synthesis of the carbocyclic analogue of oxetanocin A.
作者:Mikio HONJO、Tokumi MARUYAMA、Yoshiko SATO、Takahiko HORII
DOI:10.1248/cpb.37.1413
日期:——
2, 3-Bis(benzoyloxymethyl)cyclobutanone (3__∼) was prepared in three steps from diethyl 3, 3-diethoxy-1, 2-cyclobutanedicarboxylate (1__∼). Hydrogenation of the oxime (4__∼) of 3__∼ provided the two amino compounds ((5a)___∼ and (5b)___∼), from which 9-[2, 3-bis(hydroxymethyl)cyclobuthyl]adenines ((9a)___∼ and (9b)___∼) were synthesized in four steps. The steric configurations of 3__∼, (5a)___∼, (5b)___∼, (9a)___∼ and (9b)___∼ were established by 1H-NMR spectroscopies including the NOE difference experiments.
2, 3-双(苯甲酰氧基甲基)环丁酮(3__∼)由3, 3-二乙氧基-1, 2-环丁二甲酸二乙酯(1__∼)分三步制备。 3__∼的肟(4__∼)氢化得到两种氨基化合物((5a)___∼和(5b)___∼),其中9-[2, 3-双(羟甲基)环丁基]腺嘌呤((9a) ___∼ 和 (9b)___∼) 分四步合成。 3__∼、(5a)___∼、(5b)___∼、(9a)___∼ 和 (9b)___∼ 的空间构型通过 1H-NMR 光谱法(包括 NOE 差异实验)建立。