WordNet

sound loudly and sonorously; "the bells rang" (同)peal
a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke" (同)halo, annulus, doughnut, anchor ring
jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger; "she had rings on every finger"; "he noted that she wore a wedding band" (同)band
a characteristic sound; "it has the ring of sincerity"
a platform usually marked off by ropes in which contestants box or wrestle
the sound of a bell ringing; "the distinctive ring of the church bell"; "the ringing of the telephone"; "the tintinnabulation that so voluminously swells from the ringing and the dinging of the bells"--E. A. Poe (同)ringing, tintinnabulation
attach a ring to the foot of, in order to identify; "ring birds"; "band the geese to observe their migratory patterns" (同)band
make (bells) ring, often for the purposes of musical edification; "Ring the bells"; "My uncle rings every Sunday at the local church" (同)knell
wearing a wedding ring; lawfully married; "a ringed wife"- Tennyson
having colored rings around the body
gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises; "the rings require a strong upper body"
the giving of a ring as a token of engagement

PrepTutorEJDIC

『指輪』 / 『輪』,環;輪形,円形 / (円形の)サーカス演技場,公演場,競技場;(ボクシング・レスリングの)リング / 《複数形で》(体操の)つり輪 / (不法な目的で結託した)(…の)徒党,一味《+『of』+『名』》 / (原子の)環 / …を円形に取り囲む,円で囲む《+『about』(『around』,《英》『round』)+『名,』+『名』+『about』(『around』,《英》『round』)+『名』》 / 〈動物〉‘に'鼻輪(首輪,足輪)をはめる / (遊びで)…‘に'輪を投げる / 環状に動く,輪を描く
〈鐘・ベルなどが〉『鳴る』 / 《『ring』+『形』〈補〉》(…のように)聞こえる / (…を)ベルを鳴らして求める《+『for』+『名』》 / 〈音声・楽器などが〉鳴り響く;〈場所が〉(音などで)満ちる《+『with』+『名』》 / 耳鳴りがする / 〈鐘・ベルなど〉‘を'『鳴らす』 / 〈人〉‘を'(鐘などを)『鳴らして呼ぶ』;…‘を'鐘を鳴らして知らせる / 《英》…‘に'電話をかける《+『up』+『名』,+『名』+『up』》 / 《単数形で》(鐘・ベルなどの)『鳴る音,響き』《+『of』+『名』》 / 鐘(ベルなど)を鳴らすこと;ベル(など)が鳴ること / 《単数形で》(…の)固有の響き,調子,感じ《+『of』+『名』》 / 《話》電話をかけること
輪にある;環状の / 指輪をはめた

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Pyridylidene-Mediated Dihydrogen Activation Coupled with Catalytic Imine Reduction.

Auth J1, Padevet J1, Mauleón P2, Pfaltz A3.
Angewandte Chemie (International ed. in English).Angew Chem Int Ed Engl.2015 Jun 26. doi: 10.1002/anie.201503233. [Epub ahead of print]
In recent years, dihydrogen activation at non-metallic centers has received increasing attention. A system in which dihydrogen is trapped by a pyridylidene intermediate that is generated from a pyridinium salt and a base is now reported. The dihydropyridine formed in this process can act as reducing
PMID 26119973

Highly torquoselective electrocyclizations and competing 1,7-hydrogen shifts of 1-azatrienes with silyl substitution at the allylic carbon.

Ma ZX1, Patel A2, Houk KN2, Hsung RP1.
Organic letters.Org Lett.2015 May 1;17(9):2138-41. doi: 10.1021/acs.orglett.5b00727. Epub 2015 Apr 10.
Highly torquoselective electrocyclizations of chiral 1-azatrienes are described. These 1-azatrienes contain an allylic stereocenter that is substituted with a silyl group and are derived in situ from condensation of γ-silyl-substituted enals with vinylogous amides. The ensuing stereoselective ring
PMID 25859907

Gold-catalyzed oxidative ring expansion of 2-alkynyl-1,2-dihydropyridines or -quinolines: highly efficient synthesis of functionalized azepine or benzazepine scaffolds.

Chen M1, Chen Y, Sun N, Zhao J, Liu Y, Li Y.
Angewandte Chemie (International ed. in English).Angew Chem Int Ed Engl.2015 Jan 19;54(4):1200-4. doi: 10.1002/anie.201410056. Epub 2014 Nov 25.
A gold-catalyzed highly regio- and chemoselective oxidative ring expansion of 2-alkynyl-1,2-dihydropyridines and its analogues using pyridine-N-oxide as the oxidant has been developed. Ring expansion proceeds through exclusive 1,2-migration of a vinyl or phenyl group, whereas no 1,2-H and 1,2-N migr
PMID 25424452

月里力,米澤渚,熊谷勉
基礎有機化学討論会要旨集（基礎有機化学連合討論会予稿集） 2010(0), 1P10-1P10, 2011
メタンスルホニル基で置換された(3Z,5Z)-1-アザオクタ-1,3,5,7-テトラエン(1)はジヒドロピリジン誘導体(2)を経由し、(3Z,5E)-異性体(<B&g …
NAID 130004729067

月里力,徳重貴之,熊谷勉
基礎有機化学討論会要旨集（基礎有機化学連合討論会予稿集） 2009(0), 270-270, 2009
メタンスルホニル基で置換された(3Z,5Z)-1-アザオクタ-1,3,5,7-テトラエン(4a)とその(3E,5Z)-異性体(4b)は、2-メタンスルホニル-2-アザビシクロ[3.2.1]オクタ-3,6-ジエンの光照射によって得られ、シリカゲルクロマトグラフィーにより無色油状物として分離することが可能である。今回はこのシス …
NAID 130004728891

Synthesis and X-ray Crystallographic Analysis of 1,4-dihydropyridine Photodimerization

, , ,
Journal of Photopolymer Science and Technology 22(3), 379-384, 2009
… 1,4-dihydropyridine undergoes a head-to-tail [2+2] photodimerization that leads to the formation of anti-dimer, syn-dimer and cage dimer in solution. … The cage dimer is formed by the intramolecular reaction of syn-dimer, and is topochemical controlled by the nearest distance between potentially reacting double bonds, rotational angles of the building cyclobutane ring and the orientation of carbonyl ester. …
NAID 130004464745