CAS: 492-97-7; 2,2'-Bithiophene

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CAS号3437-95-4 2-碘噻吩 | CAS号1003-09-4 2-溴噻吩 | CAS号6165-68-0 2-噻吩硼酸 | CAS号188290-36-0 Thiophene(SIV) | CAS号54663-78-4 2-三丁基甲锡烷基噻吩 | CAS号5713-61-1 2-噻吩基溴化镁 | CAS号5029-67-4 2-碘吡啶 | CAS号5980-89-2 dithiophen-2-yl... | CAS号2786-07-4 2-噻吩基锂 | CAS号15629-92-2 1,3-双(二苯基膦丙烷)二氯化镍 | CAS号111573-81-0 2-[2-oxo-2-(5-t... | CAS号104499-99-2 5,5''-二碘-2,2':5... | CAS号106925-79-5 5-(4-METHOXYPHE... | CAS号4805-22-5 5,5'-二溴-2,2'-联噻吩 | CAS号3480-11-3 5-溴-2,2'-双噻吩 | CAS号3515-18-2 3,4-二甲基噻吩 | CAS号18494-73-0 5,5-二乙酰基-2,2-联噻吩 | CAS号3779-27-9 2,2'-联噻吩-5-甲醛 | CAS号4380-96-5 2,2'-联噻吩-5-甲胺 | CAS号3339-79-5 5-Iodo-2,2'-bit...

在 一水合肼,Potassium Hydroxide体系中,用 二甲基亚砜 作为反应溶剂,化学反应 4.0H,以73%的收率获得产物2,2'-联二噻吩
参考文献:一种无金属催化条件下断裂酮中α碳-碳单键的方法
标题:一种无金属催化条件下断裂酮中α碳-碳单键的方法
摘要:本发明公开了一种无金属催化条件下选择性活化和断裂酮中α碳-碳单键的方法.本方法的特征在于:在无金属催化剂的情况下,通过溶剂诱导以及酮和肼形成的中间体结构因素驱动,活化断裂酮中α碳-碳单键.此方法不需要过渡金属进行催化,对环境友好,一定程度上降低了反应成本,丰富了碳-碳单键选择性断裂的方法学,并为实现温和条件下惰性化学键的活化提供了新的思路.

专利信息

专利号:US-6995289-B2
优先权日:2000-08-02
标题 :Process for synthesis of alpha, beta-unsaturated ketones
发明人：PATEL IAN; HOPES PHILIP
权利人:ASTRAZENECA AB
摘要:A method for the synthesis of an α,β-unsaturated ketone useful for making substituted 1,4-dihydropyridines is described by reacting an aldehyde with pyrrolidine and then adding a ketone followed by trifluoroacetic acid at low temperature. The synthesis is used in a process for making substituted 1,4-dihydropyridines wherein a vinylogous amide is prepared by reacting a 1,3-cyclohexanedione with a phenylethylamine. The α,β-unsaturated ketone can be reacted with a vinylogous amide to form a 1,5-diketone which can be converted to a substituted 1,4-dihydropyridine.

专利号:US-5247099-A
优先权日:1989-08-17
标题:Process for synthesis of 7-hydroxy coumarins having substitutions in the 4-position
发明人：CELEBUSKI JOSEPH E
权利人:ABBOTT LAB
摘要:A process for synthesis of a compound of the formula: said process comprising the steps of (a) reacting 4-bromomethyl-7-methoxy coumarin with a malonic ester under conditions sufficient to achieve condensation of the ester to give the monoalkylated (2-bis(carbalkoxy)-2-R1-1-ethyl) derivative; (b) removing one of the carbalkoxy groups from the product of step (a); (c) demethylation of the product of step (b) to give the 7-hydroxycoumarin compound; and (d) chemically modifying the remaining ester to yield a desired R2.

专利号:WO-2021019559-A1
优先权日:2019-07-30
标题 :Synthesis of 5-(3-pyridyl)-2,2'-bithiophene(sensitizer)
发明人：DATLA ANUPAMA; NAGRE PRASHANT; TAMORE JAGDISH; PRABHU MANOJKUMAR SADANAND; KADAM SACHIN VASANT
权利人:FERMENTA BIOTECH LTD
摘要:Disclosed herein is a novel simple, short process for synthesis of the photosensitizer, 5-(3-pyridyl)-2,2'-bithiophene.

专利号:US-12358871-B2
优先权日:2019-05-15
标 题:Photochemical synthesis of vitamin D3 using sensitizers
发明人：DATLA ANUPAMA; NAGRE PRASHANT; TAMORE JAGDISH; TRIVIKRAM SREENATH; DEGAONKAR GAJANAN
权利人:FERMENTA BIOTECH LTD
摘要:The present invention discloses an improved photochemical synthesis of vitamin D3 from 7-dehydrocholesterol alone or in combination with sterol precursors in presence of the photosensitizer of Formula I in high yield and with reduced levels of impurities.

专利号:US-4968815-A
优先权日:1990-04-16
标题 :Synthesis of (S)-3-(thien-2-ylthio)butyric acid analogs
发明人：BLACKLOCK THOMAS J; SHINKAI ICHIRO
权利人:MERCK & CO INC
摘要:(S)-3-(thien-2-ylthio)butyric acid analogs are intermediates in the synthesis of the chiral (S,S)-5,6-dihydro-4-ethylamino-6-methyl-4H-thieno[2,3-b]thiopyran-2-sulfonamide-7,7-dioxide and analogs thereof, topically effective carbonic anhydrase inhibitors useful in the treatment of ocular hypertension and glaucoma. They are prepared by condensation of 2-mercaptothiophene and (R)-(+)-β-methyl-β-propiolactone or an analog thereof.

专利号:US-7247230-B2
优先权日:2003-08-08
标 题:Electrochemical synthesis and processing of conducting polymers in supercritical media
发明人：MABROUK PATRICIA ANN
权利人:UNIV NORTHEASTERN
摘要:The present invention deals with the electrochemical synthesis of electrically conductive polymers in supercritical fluids, for example supercritical CO 2 . The use of the supercritical fluid as a solvent results in the reduction or elimination of hazardous reagents and environmentally hazardous waste, which was generated in the prior chemical synthesis techniques. The electrochemical approach eliminates the need to add a charge transfer agent as the electrode serves this purpose. The resulting polymers are characterized by high conductivities and distinctive surface morphology, which suggests that they may be more appropriate than the previous materials for certain applications (e.g., corrosion inhibition, optical applications, etc.).