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    • 1. 发明授权
    • Alpha 1a adrenergic receptor antagonists
    • Alpha 1a肾上腺素能受体拮抗剂
    • US06320049B1
    • 2001-11-20
    • US09563203
    • 2000-05-02
    • Daniel R. SidlerRobert D. LarsenWenjie Li
    • Daniel R. SidlerRobert D. LarsenWenjie Li
    • C07D23922
    • C07D239/22C07D401/04C07D401/14
    • This invention relates to crystalline pharmaceutically acceptable salts of an alpha 1a adrenergic receptor antagonist, Compound A, which are useful in the treatment of benign prostatic hyperplasia. Pharmaceutical compositions employing the crystalline salts, and processes for making and using the crystalline salts and pharmaceutical compositions of Compound A are also disclosed. This invention further relates to a process for obtaining enantiomerically pure intermediate useful for the synthesis of end product alpha 1a adrenergic receptor antagonists. The end product compounds are useful for the treatment of benign prostatic hyperplasia and for relaxing lower urinary tract tissue. The invention also relates to a process for preparing a class of dihydropyrimidinone compounds of which Compound A is a member, wherein the process involves deprotonating a dihydropyrimidinone compound and then coupling the deprotonated derivative with a primary amine.
    • 本发明涉及可用于治疗良性前列腺增生的α1α肾上腺素能受体拮抗剂,化合物A的结晶药学上可接受的盐。 还公开了使用结晶盐的药物组合物,以及制备和使用化合物A的结晶盐和药物组合物的方法。 本发明还涉及用于获得可用于合成终产物α1α肾上腺素能受体拮抗剂的对映体纯中间体的方法。 最终产品化合物可用于治疗良性前列腺增生和放松下尿路组织。 本发明还涉及一种制备其中化合物A为成员的一类二氢嘧啶酮化合物的方法,其中该方法包括使二氢嘧啶酮化合物去质子化,然后将去质子化衍生物与伯胺偶联。
    • 2. 发明授权
    • Process for preparing &bgr;-hydroxycarbamates and their conversion to oxazolidinones
    • 制备β-羟基氨基甲酸酯及其转化为恶唑烷酮的方法
    • US06372911B1
    • 2002-04-16
    • US09482799
    • 2000-01-13
    • Nancy BartaRobert D. LarsenDaniel R. SidlerSteven A. Weissman
    • Nancy BartaRobert D. LarsenDaniel R. SidlerSteven A. Weissman
    • C07D41312
    • C07D413/12C07C271/16C07D211/18C07D263/38
    • A process for preparing a &bgr;-hydroxy carbamate product is disclosed. The process comprises reacting an olefin compound containing at least one carbon-carbon double bond with a carbamate in an aqueous solvent and in the presence of a base, an osmium catalyst, a co-oxidant selected from a halohydantoin, a haloisocyanuric acid, and an alkali metal salt of a haloisocyanuric acid, and optionally an asymmetric ligand, to form a reaction mixture containing the &bgr;-hydroxy carbamate product. The process optionally further comprises treating the &bgr;-hydroxy carbamate product with additional base to form an oxazolidinone. The oxazolidinones are useful as chiral auxiliary agents and as intermediates for the formation of pharmaceutically active substances such as alpha 1 a adrenergic receptor antagonists. A process for preparing nitrogen-functionalized derivatives of the oxazolidinones is also disclosed.
    • 公开了一种制备β-羟基氨基甲酸酯产物的方法。 该方法包括使含有至少一个碳 - 碳双键的烯烃化合物与氨基甲酸酯在水溶剂中反应,并在碱,锇催化剂,选自卤代乙内酰脲,卤代异氰脲酸和 卤代异氰尿酸的碱金属盐和任选的不对称配体,以形成含有β-羟基氨基甲酸酯产物的反应混合物。 该方法任选地还包括用另外的碱处理β-羟基氨基甲酸酯产物以形成恶唑烷酮。 恶唑烷酮可用作手性助剂,也可用作形成药物活性物质如α1肾上腺素能受体拮抗剂的中间体。 还公开了制备恶唑烷酮的氮官能化衍生物的方法。
    • 6. 发明授权
    • Tree delimber
    • TREE DELIMBER
    • US4111245A
    • 1978-09-05
    • US754058
    • 1976-12-23
    • Carl M. McCraryRobert D. Larsen
    • Carl M. McCraryRobert D. Larsen
    • A01G23/097B27L1/00
    • A01G23/097
    • An apparatus for delimbing felled trees is described, wherein the trees are pulled individually or, in some cases, in bundles through the delimber. The delimber is provided with a base; a lower impact shear blade which is a notched steel plate supported upon the base, the notch bounding the under half circumference of a tree in the delimber; upper impact shear blades which are a pair of arcuate arms pivoted on the base, designed and arranged such that a tree resting in the notched plate is bound substantially about its upper half circumference by the arcuate arms pivoted into contact with the tree; and an activating plate, pivoted upon the base, interconnected with the arcuate arms such that the weight and force of a tree pulled through the delimber in contact with the notched plate, acts upon the activating plate causing it to pivot thereby pulling the arms into contact with the tree. Additionally, a biasing system is described which maintains the arcuate arms in an open position for receiving a tree to be delimbed, which system causes the arcuate arms to remain pivoted outboard the delimber center line whenever there is no tree acting upon the activating plate.
    • 8. 发明授权
    • Palladium catalyzed indolization
    • 钯催化吲哚化
    • US5808064A
    • 1998-09-15
    • US908683
    • 1997-08-07
    • Cheng-Yi ChenRobert D. Larsen
    • Cheng-Yi ChenRobert D. Larsen
    • C07D209/12C07D209/14C07D521/00C07F7/08C07D413/12C07D209/04
    • C07D231/12C07D209/12C07D209/14C07D233/56C07D249/08C07F7/0818C07F7/083Y02P20/55
    • We have found that 2-unsubstituted indoles of structural formula (IV) can be cost-effectively synthesized in high yield by the palladium-catalyzed coupling/ring closure of a 2-halo or 2-trifluoromethylsulfonyloxy aniline (I) and an acyl silane derivative (II), followed by deprotection of the silyl protecting groups. ##STR1## The process of the present invention is particularly useful to form indoles containing acid-labile substituents such as triazole, acetyl, ketal, cyano, and carbamate, or indoles having a good leaving group in the benzyl position. The advantages of the present process are that it does not require the use of triphenyl phosphine or tetrabutyl ammonium chloride or lithium chloride. When applied to 5-triazolyl substituted indoles, the present process also eliminates the tendency of triazolyl polymerization in the Fischer indole synthesis.
    • 我们已经发现,2-卤代或2-三氟甲基磺酰氧基苯胺(I)和酰基硅烷衍生物的钯催化偶联/闭环可以以高收率成本有效地合成结构式(Ⅳ)的2-未取代的吲哚 (II),然后甲硅烷基保护基的脱保护。 本发明的方法特别可用于形成含有酸不稳定取代基的吲哚,例如三唑,乙酰基,缩酮,氰基和氨基甲酸酯,或具有良好离去基团的吲哚 苄基位置。 本方法的优点是不需要使用三苯基膦或四丁基氯化铵或氯化锂。 当应用于5-三唑基取代的吲哚时,本发明方法也消除了在费歇尔吲哚合成中三唑基聚合的倾向。