利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

360 条记录 (耗时 0.021 秒)

    Process for preparing coumarin sulfonates
    4.
    发明授权
    Process for preparing coumarin sulfonates 失效
    香豆素磺酸盐的制备方法

    公开(公告)号：US5773591A

    公开(公告)日：1998-06-30

    申请号：US813106

    申请日：1997-03-07

    申请人： Mohammad Aslam ,  Michael T. Sheehan ,  George Kvakovszky

    发明人： Mohammad Aslam ,  Michael T. Sheehan ,  George Kvakovszky

    IPC分类号： G03F7/004 ,  C07D311/56 ,  C07D335/06 ,  C07D311/20

    CPC分类号： C07D311/56

    摘要： A novel process for preparing sulfonic acid esters and amides of benzo-heterocyclic diazo diketo compounds, such as substituted diazo-4-oxo-3,4-dihydrocoumarins, which are useful synthetic intermediates in a wide variety of applications including photoresists, opto-electronics, agricultural, and pharmaceutical applications is disclosed and claimed. The process comprises the steps of (a) subjecting a substituted benzo-heterocyclic .beta.-keto-enol compound to suitable diazo transfer conditions in the presence of a diazo transfer agent; (b) subjecting the so formed diazo diketo compound to suitable halosulfonation conditions in the presence of a halosulfonation agent; and (c) subjecting the so formed halosulfonyl aromatic compound to suitable substitution reaction in the presence of an alcohol or an amine to form the corresponding sulfonic acid ester or amide of benzo-heterocyclic diazo diketo compound. The compounds formed from the process of the present invention exhibit very high photosensitivity in the deep ultraviolet (DUV) region (ca. 250 nm), and therefore, are useful as photoactive compounds in DUV photoresist formulations.

    摘要翻译： 一种用于制备苯并杂环重氮二酮化合物的磺酸酯和酰胺的新方法，例如取代的重氮-4-氧代-3,4-二氢香豆素，其在各种应用中是有用的合成中间体，包括光致抗蚀剂，光电子 ，农业和药物应用被公开和要求保护。 该方法包括以下步骤：（a）在重氮转移剂存在下使取代的苯并杂环的β-酮 - 烯醇化合物进行合适的重氮转移条件; （b）在卤代磺化剂的存在下使如此形成的重氮二酮化合物进行适当的卤代磺化条件; 和（c）使这样形成的卤代磺酰基芳族化合物在醇或胺的存在下进行适当的取代反应，形成相应的苯并杂环重氮二酮化合物的磺酸酯或酰胺。 由本发明方法形成的化合物在深紫外（DUV）区域（约250nm）中表现出非常高的光敏性，因此可用作DUV光致抗蚀剂制剂中的光活性化合物。

    Process for the preparation of thermotropic aromatic polyesters directly from dialkyl aromatic esters
    8.
    发明授权
    Process for the preparation of thermotropic aromatic polyesters directly from dialkyl aromatic esters 失效
    直接由二烷基芳族酯制备热致芳香族聚酯的方法

    公开(公告)号：US5731401A

    公开(公告)日：1998-03-24

    申请号：US723036

    申请日：1996-09-30

    申请人： Balaram Gupta ,  Matthew J. Bylicki

    发明人： Balaram Gupta ,  Matthew J. Bylicki

    IPC分类号： C08G63/60 ,  C08G63/78 ,  C08G63/82 ,  C08G69/44 ,  C08G63/02

    CPC分类号： C08G63/605 ,  C08G63/78 ,  C08G63/82 ,  C08G69/44

    摘要： A new process is provided for the formation of aromatic polyesters directly from the reaction of dialkyl ester of an aromatic carboxylic acid with dihydric phenols. The polycondensation is carried out in the presence of (a) a condensing agent; (b) a catalyst selected from the group consisting of derivatives of Group I metals, derivatives of Group IV A metals, derivatives of Group IV B metals, and mixtures thereof; and (c) a co-catalyst selected from the group consisting of methanesulfonic acid, sulfuric acid, p-toluenesulfonic acid, alkanoic acid having the formula, C.sub.n H.sub.x F.sub.y COOH, where n is an integer from 1 to 4, x and y are integers from 0 to 2n+1, and the sum of x and y is 2n+1, and mixtures thereof; at suitable temperature and pressure conditions and for a sufficient period of time to form the aromatic polyester.

    摘要翻译： 提供了一种直接由芳族羧酸与二元酚的二烷基酯反应形成芳族聚酯的新方法。 缩聚在（a）缩合剂存在下进行; （b）选自I族金属的衍生物，IV族金属的衍生物，IVB族金属的衍生物及其混合物的催化剂; 和（c）选自甲磺酸，硫酸，对甲苯磺酸，具有式CnHxFyCOOH的链烷酸的助催化剂，其中n为1至4的整数，x和y为0的整数 至2n + 1，x和y的和为2n + 1，及其混合物; 在合适的温度和压力条件下并持续足够的时间以形成芳族聚酯。

    Method of making starch acetate using an acid catalyst
    9.
    发明授权
    Method of making starch acetate using an acid catalyst 失效
    使用酸催化剂制备乙酸淀粉的方法

    公开(公告)号：US5710269A

    公开(公告)日：1998-01-20

    申请号：US584931

    申请日：1996-01-16

    申请人： Bernice I. Feuer

    发明人： Bernice I. Feuer

    IPC分类号： C08B31/04 ,  C08B31/02 ,  C08B33/02 ,  C08B35/02

    CPC分类号： C08B31/04

    摘要： Methods of synthesizing starch acetate containing at least 20% high molecular weight carbohydrates using a MSA catalyst alone, or in combination with a co-catalyst promoting cross-linking, such a phosphoric acid, are described. The MSA is desirably added slowly following beginning of the exothermic reaction of starch, acetic acid and acetic anhydride.

    摘要翻译： 描述了使用单独的MSA催化剂或与助催化促进交联的助催化剂（例如磷酸）合并含有至少20％高分子量碳水化合物的淀粉乙酸酯的方法。 淀粉，乙酸和乙酸酐的放热反应开始后，MSA最好缓慢加入。