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The Barton–Zard reaction is a route to pyrrole derivatives via the reaction of a nitroalkene with an α-isocyanide under basic conditions.[1] It is named after Derek Barton and Samir Zard who first reported it in 1985.[2] Mechanism The mechanism consists of five steps: Base catalyzed carbonyl enolization of the α-isocyanide. Michael-type addition between the α-isocyanide carbonyl enolate and the nitroalkene. 5-endo-dig cyclization (see: Baldwin's rules). Base catalyzed eli...

مقاطعة فولتن     الإحداثيات 33°47′N 84°28′W / 33.79°N 84.47°W / 33.79; -84.47  [1] تاريخ التأسيس 20 ديسمبر 1853  تقسيم إداري  البلد الولايات المتحدة[2][3]  التقسيم الأعلى جورجيا  العاصمة أتلانتا  التقسيمات الإدارية أتلانتا  خصائص جغرافية  المساح�...

Prefecture of Japan Prefecture in Chūbu, JapanFukui Prefecture 福井県PrefectureJapanese transcription(s) • Japanese福井県 • RōmajiFukui-kenPanoramic view of the Fukui plain, Fukui prefecture from the top of Monju FlagSymbolAnthem: Fukui kenminkaCountry JapanRegionChūbu (Hokuriku)IslandHonshūCapitalFukuiSubdivisionsDistricts: 7, Municipalities: 17Government • GovernorTatsuji SugimotoArea • Total4,190.49 km2 (1,617.96 ...

Traité de Versailles (version anglaise), signé en 1919 et ayant mis fin à la Première Guerre mondiale. Un traité de paix est un traité proclamant la fin d'une guerre et contenant souvent des contreparties réciproques pour les anciens belligérants. Il est à différencier d'un armistice qui est un accord concernant seulement l'arrêt des combats et d'un cessez-le-feu, temporaire ou d'une capitulation qui est généralement inconditionnelle pour l'État vaincu. Il se conclut toujours av...

Burung hantu Mauritius Mascarenotus sauzieri Status konservasiPunahIUCN22728861 TaksonomiKerajaanAnimaliaFilumChordataKelasAvesOrdoStrigiformesFamiliStrigidaeGenusMascarenotusSpesiesMascarenotus sauzieri (Newton dan Gadow, 1893) Tata namaSinonim takson Strix sauzieri Newton & Gadow, 1893 Scops commersoni Oustalet, 1896 Strix newtoni (pejantan) Rothschild, 1907 Tyto sauzieri (betina) Hachisuka, 1953 Tyto newtoni (pejantan) Hachisuka, 1953 ProtonimStrix sauzieri Distribusi EndemikMauritius ...

數字 26 26 ← 25 26 27 → 数表 — 整数 <<  20 21 22 23 24 25 26 27 28 29 >> 命名小寫二十六大寫貳拾陸序數詞第二十六twenty-sixth識別種類整數性質質因數分解 {\displaystyle } 2 × 13 {\displaystyle 2\times 13} 表示方式值26算筹希腊数字ΚϚ´ 羅馬數字XXVI 巴比伦数字𒎙𒐚 二进制11010(2)三进制222(3)四进制122(4)五进制101(5)八进制32(8)十二进制22(...

Kisdorf Lambang kebesaranLetak Kisdorf di Segeberg NegaraJermanNegara bagianSchleswig-HolsteinKreisSegeberg Municipal assoc.Kisdorf Pemerintahan • MayorHarro SchmidtLuas • Total24,52 km2 (947 sq mi)Ketinggian69 m (226 ft)Populasi (2013-12-31)[1] • Total3.796 • Kepadatan1,5/km2 (4,0/sq mi)Zona waktuWET/WMPET (UTC+1/+2)Kode pos24629Kode area telepon04191, 04193, 04194, 04535Pelat kendaraanSESitus webwww.k...

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (ديسمبر 2018) بايرون كيث   معلومات شخصية الميلاد 17 نوفمبر 1917   إل باسو  الوفاة 19 يناير 1996 (78 سنة)   لوس أنجلوس  سبب الوفاة نوبة قلبية  مواطنة الولايات المتحدة&...

† Человек прямоходящий Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:Синапсиды�...

English singer, television personality (born 1991) Joe McElderryMcElderry at The Sage Gateshead in 2012Background informationBirth nameJoseph McElderryBorn (1991-06-16) 16 June 1991 (age 32)South Shields, Tyne and Wear, EnglandGenres Pop operatic pop country pop Occupation(s)Singer, songwriter, modelInstrument(s)VocalsYears active2007–presentLabelsSyco Music (2009–2011)Decca (2011–present)WebsiteOfficial websiteMusical artist Joseph McElderry (/məˈkɛldəri/; born 16 June 1991) i...

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Football tournament season 1877–78 Scottish CupThe Scottish Cup trophyTournament detailsCountryScotlandTeams116Defending championsVale of LevenFinal positionsChampionsVale of Leven(second title)Runner-up3rd Lanark RVTournament statisticsMatches played134Goals scored422 (3.15 per match)← 1876–771878–79 → The 1877–78 Scottish Cup – officially the Scottish Football Association Challenge Cup – was the fifth season of Scotland's most prestigious fo...

Pusaran Pasifik Selatan Pusaran Pasifik Selatan adalah bagian dari sistem arus samudra dunia. Arus ini berbatasan dengan khatulistiwa di utara, Australia di barat, Arus Lingkar Kutub Antarktika di selatan, dan Amerika Selatan di timur.[1] Di tengah pusaran ini terdapat tempat yang paling terpencil dari daratan Bumi dan lautan produktif dan diakui sebagai gurun laut terbesar di dunia.[2] Seperti empat pusaran lainnya, pusaran ini memiliki kandungan plastik pelagik, limbah kimia...

Aerial warfare branch of Syria's armed forces Syrian Arab Air Forceالْقُوَّاتُ الْجَوِّيَّةُ الْعَرَبِيَّةُ السُّورِيَّةُal-Quwwāt al-Jawwīyah al-ʿArabīyah as-SūrīyahBadge of the Syrian Arab Air ForceFounded1948; 76 years ago (1948)[a]Country SyriaTypeAir forceRoleAerial warfareSize15,000[1]Part of Syrian Armed ForcesHeadquartersDamascusNickname(s)Nosour Qasioun (Arabic: نُسُور قَاس�...

British Conservative politician The subject of this article is standing for re-election to the House of Commons of the United Kingdom on 4 July, and has not been an incumbent MP since Parliament was dissolved on 30 May. Some parts of this article may be out of date during this period. Please feel free to improve this article (but note that updates without valid and reliable references will be removed) or discuss changes on the talk page. Rebecca PowMPOfficial portrait, 2020Parliamen...

Waterfall in Nova Scotia, CanadaDevils Hill FallsLower Devils Hill Falls, Victoria County, Nova ScotiaShow map of Nova ScotiaShow map of CanadaLocationDevils Hill, Nova Scotia, CanadaCoordinates45°58′41.43″N 60°01′44.53″W / 45.9781750°N 60.0290361°W / 45.9781750; -60.0290361TypeUpper & Lower classical ledge waterfalls connected by a cascadeTotal height12.5 metres (41 ft)Number of drops3Longest drop6 metres (20 ft)WatercourseDevils Hill Brook D...

Questa voce o sezione sull'argomento edizioni di competizioni calcistiche non cita le fonti necessarie o quelle presenti sono insufficienti. Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti. Segui i suggerimenti del progetto di riferimento. Copa Argentina 2019-2020Copa Argentina AXION energy 2019-2020 Competizione Copa Argentina Sport Calcio Edizione 11ª Organizzatore AFA Date dal 15 gennaio 2020all'8 dicembre 2021 L...

1986 studio album by The Flaming Lips Hear It IsStudio album by the Flaming LipsReleasedJanuary 21, 1986Genre Alternative rock noise rock Length44:22Label Restless Rykodisc Producer The Flaming Lips Randy Burns The Flaming Lips chronology The Flaming Lips(1984) Hear It Is(1986) Oh My Gawd!!!(1987) Professional ratingsReview scoresSourceRatingAllMusic[1]Encyclopedia of Popular Music[2]The Great Rock Discography5/10[3]MusicHound3/5[4]Paste6.9/10[5]The...

CD Universidad CatólicaCalcio Católica, Los Cruzados, UC Segni distintiviUniformi di gara Casa Trasferta Terza divisa Colori sociali Bianco, blu Dati societariCittàSantiago del Cile Nazione Cile ConfederazioneCONMEBOL Federazione ANFP CampionatoPrimera División Chilena Fondazione1937 Presidente Juan Tagle Allenatore Tiago Nunes StadioSan Carlos de Apoquindo(20 000[1] posti) Sito webwww.cruzados.cl PalmarèsTitoli nazionali16 Campionati cileni Trofei nazionali4 Copa Chile...

Optimization algorithm The Frank–Wolfe algorithm is an iterative first-order optimization algorithm for constrained convex optimization. Also known as the conditional gradient method,[1] reduced gradient algorithm and the convex combination algorithm, the method was originally proposed by Marguerite Frank and Philip Wolfe in 1956.[2] In each iteration, the Frank–Wolfe algorithm considers a linear approximation of the objective function, and moves towards a minimizer o...