Method for the preparation of chromanone 7
    3.
    发明授权
    Method for the preparation of chromanone 7 失效
    色酮的制备方法7

    公开(公告)号:US5847164A

    公开(公告)日:1998-12-08

    申请号:US925706

    申请日:1997-09-09

    摘要: A method of preparing (.+-.)-calanolide A, 1, a potent HIV reverse transcriptase inhibitor, from chromene 4 is provided. Useful intermediates for preparing (.+-.)-calanolide A and its derivatives are also provided. According to the disclosed method, chromene 4 intermediate was reacted with acetaldehyde diethyl acetal or paraldehyde in the presence of an acid catalyst with heating, or a two-step reaction including an aldol reaction with acetaldehyde and cyclization either under acidic conditions or neutral Mitsunobu conditions, to produce chromanone 7. Reduction of chromanone 7 with sodium borohydride, in the presence of cerium trichloride, produced (.+-.)-calanolide A. A method for resolving (.+-.)-calanolide A into its optically active forms by a chiral HPLC system or by enzymatic acylation and hydrolysis is also disclosed. Finally, a method for treating or preventing viral infections using (.+-.)-calanolide A or (-)-calanolide A is provided.

    摘要翻译: 提供了从色烯4制备(+/-) - 丙内酰脲A,1,一种有效的HIV逆转录酶抑制剂的方法。 还提供了制备(+/-) - 丙内酰脲A及其衍生物的有用中间体。 根据所公开的方法,在酸催化剂的存在下,将色烯4中间体与乙醛二乙基缩醛或对甲醛反应,或者在酸性条件或中性Mitsunobu条件下,包括醛醇与乙醛反应和醛化反应的两步反应, 产生苯并二氢吡喃酮7.在三氯化铈的存在下,用硼氢化钠还原色酮7.产生(+/-) - 甘露糖苷A。一种通过手性拆分(+/-) - 卡立拉内酯A至其光学活性形式的方法 还公开了HPLC系统或通过酶酰化和水解。 最后,提供了一种使用(+/-) - 蒎烯内酰胺A或( - ) - cal醇酯A治疗或预防病毒感染的方法。

    Method for the preparation of aldol product 7B
    6.
    发明授权
    Method for the preparation of aldol product 7B 失效
    醛醇产品7B的制备方法

    公开(公告)号:US5840921A

    公开(公告)日:1998-11-24

    申请号:US925992

    申请日:1997-09-09

    摘要: A method of preparing (.+-.)-calanolide A, 1, a potent HIV reverse transcriptase inhibitor, from chromene 4 is provided. Useful intermediates for preparing (+)-calanolide A and its derivatives are also provided. According to the disclosed method, chromene 4 intermediate was reacted with acetaldehyde diethyl acetal or paraldehyde in the presence of an acid catalyst with heating, or a two-step reaction including an aldol reaction with acetaldehyde and cyclization either under acidic conditions or neutral Mitsunobu conditions, to produce chromanone 7. Reduction of chromanone 7 with sodium borohydride, in the presence of cerium trichloride, produced (.+-.)-calanolide A. A method for resolving (.+-.)-calanolide A into its optically active forms by a chiral HPLC system or by enzymatic acylation and hydrolysis is also disclosed. Finally, a method for treating or preventing viral infections using (.+-.)-calanolide A or (-)-calanolide A is provided.

    摘要翻译: 提供了从色烯4制备(+/-) - 丙内酰脲A,1,一种有效的HIV逆转录酶抑制剂的方法。 还提供了制备(+) - 蒎烯内酯A及其衍生物的有用的中间体。 根据所公开的方法,在酸催化剂的存在下,将色烯4中间体与乙醛二乙基缩醛或对甲醛反应,或者在酸性条件或中性Mitsunobu条件下,包括醛醇与乙醛反应和醛化反应的两步反应, 产生苯并二氢吡喃酮7.在三氯化铈的存在下,用硼氢化钠还原色酮7.产生(+/-) - 甘露糖苷A。一种通过手性拆分(+/-) - 卡立拉内酯A至其光学活性形式的方法 还公开了HPLC系统或通过酶酰化和水解。 最后,提供了一种使用(+/-) - 蒎烯内酰胺A或( - ) - cal醇酯A治疗或预防病毒感染的方法。

    Method for the preparing �9-12-(Diethoxyphosphonomethoxy)ethyl!adenine
and analogues thereof
    10.
    发明授权
    Method for the preparing �9-12-(Diethoxyphosphonomethoxy)ethyl!adenine and analogues thereof 失效
    制备9-Ä2-(二乙氧基膦酰基甲氧基)乙基ÜÜ烯及其类似物的方法

    公开(公告)号:US5874577A

    公开(公告)日:1999-02-23

    申请号:US831922

    申请日:1997-04-02

    CPC分类号: C07F9/65616 C07F9/6561

    摘要: Unprotected adenine, 6-chloropurine, 2,6-diaminopurine, and 2-amino-6-chloropurine have been directly coupled with 2-(diethoxyphosphonomethoxy)ethanol under a disclosed method to provide acyclic phosphonate nucleotide analogues which are intermediates for antiviral agents such as 9-�2-(phosphonomethoxy)ethyl!adenine (PMEA) and its analogues having a structure of formula I: ##STR1## wherein Z represents N or CH; R.sub.1 represents hydrogen, alkyl, aryl, or arylalkyl; R.sub.2 and R.sub.3 are independently selected from H, OH, halo, NH.sub.2, C.sub.6 H.sub.5 CH.sub.2 O, or R.sub.4 R.sub.5 N wherein R.sub.4 and R.sub.5 are independently selected from alkyl, aryl, or arylalkyl.

    摘要翻译: 已公开的方法将未保护的腺嘌呤,6-氯嘌呤,2,6-二氨基嘌呤和2-氨基-6-氯嘌呤直接与2-(二乙氧基膦基甲氧基)乙醇偶联,得到无环磷酸酯核苷酸类似物,其为抗病毒剂的中间体,例如 9- [2-(膦酰甲氧基)乙基]腺嘌呤(PMEA)及其具有式I结构的类似物:其中Z表示N或CH; R1代表氢,烷基,芳基或芳基烷基; R2和R3独立地选自H,OH,卤素,NH2,C6H5CH2O或R4R5N,其中R4和R5独立地选自烷基,芳基或芳烷基。