Synthesis and Antifungal Activities of Novel 5-Amino-6-arylamino- 1<i>H</i>-pyrazolo[3,4-<i>d</i>]pyrimidin-4(5<i>H</i>)-one Derivatives
作者:Hong-Qing Wang、Wei-Pimg Zhou、Yu-Yuan Wang、Can-Rong Lin
DOI:10.1021/jf801359f
日期:2008.8.1
A novel approach was developed to regioselectively synthesize new 5-amino-6-arylamino-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 5 derivatives via a tandem aza-Wittig and annulation reactions of iminophosphorane 2, aromatic isocyanates, and hydrazine in 52-92% isolated yields. The compounds 5 reacted with triethyl orthoformate to give 1,8-2H-pyrazolo[3,4-d][1,2,4]triazolo[1,5-a]pyrimidin-4-ones 6 in good
通过串联aza-Wittig和亚氨基正膦2的环化反应,开发了一种新方法来区域选择性地合成新的5-amino-6-arylamino-1H-pyrazolo [3,4-d] pyrimidin-4(5H)-one 5衍生物。芳族异氰酸酯和肼的分离产率为52-92%。化合物5与原甲酸三乙酯反应生成高产率的1,8-2H-吡唑并[3,4-d] [1,2,4]三唑并[1,5-a]嘧啶-4-酮6(62- 94%)。通过光谱数据(IR,(1)H NMR,MS),元素分析或X射线衍射晶体学清楚地确认了它们的结构。初步的生物测定结果表明,化合物5和6对灰葡萄孢和菌核盘菌具有较高的抗真菌活性。当R为Me而不是PhCH 2时,化合物5的抗真菌活性更好。尤其是化合物6c,6g,