会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Process for producing phosphineoxide vitamin D precursors
    • 生产氧化膦维生素D前体的方法
    • US06603030B1
    • 2003-08-05
    • US09537209
    • 2000-03-29
    • Marek Michal Kabat
    • Marek Michal Kabat
    • C07C40100
    • C07F9/532Y02P20/55
    • A process for producing a compound of the formula: where Ph is phenyl, X1 and X2 are both hydrogen or X1 and X2 taken together are CH2, R1 is a protecting group, R2 is fluorine, hydrogen, or OR3, where R3 is a protecting group, and the squiggly line represents a bond that results in the adjacent double bond being in either the E or Z configuration, involves: (a) chlorinating a compound of the formula: where X1, X2, R1, R2, and the squiggly line are as above, using triphosgene in the presence of an organic base to obtain the compound of the formula: where X1, X2, R1, R2, and the squiggly line are as above; and (b) reacting the compound of formula 3 with a salt of diphenyl phosphine oxide to obtain the compound of formula 1. Each of the above steps (a) and (b) are individually useful.
    • 制备下式化合物的方法:其中Ph为苯基,X1和X2均为氢或X1和X2一起为CH2,R1为保护基,R2为氟,氢或OR3,其中R3为保护基 并且波纹线表示导致相邻双键处于E或Z构型的键,其包括:(a)氯化下式的化合物:其中X1,X2,R1,R2和波峰线 如上所述,在有机碱的存在下使用三光气,得到下式的化合物:其中X1,X2,R1,R2和波纹如上所述; 和(b)使式3的化合物与二苯基氧化膦的盐反应,得到式1的化合物。上述步骤(a)和(b)中的每一个可单独使用。