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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共72条记录   Synthesis and reactivity of 3-methylsulfinyl-2H-cyclohepta[b]furan-2-ones. [作者：Higashi, Junya;Okada, Kazuyuki;Shoji, Taku;Toyota, Kozo;Watanabe, Masataka;Yasunami, Masafumi;Kikuchi, Shigeru;Ito, Shunji;Morita, Noboru;,期刊：Heterocycles, 页码：759-770 , 文章类型： 研究论文，,卷期：2008年76-1] 2H-Cyclohepta[b]furan-2-one (I) reacted with Me2S.(HO3SCF3)2 to give dimethyl(2-oxo-2H-cyclohepta[b]fur-3-yl)sulfonium triflate, which was treated with Et3N to give 3-methylthio-2H-cyclohepta[b]furan-2-one. The latter su... Development of bifunctional acyclic hydroxylguanidine organocatalyst: application to asymmetric nucleophilic epoxidation. [作者：Shin, Bongki;Tanaka, Shinji;Kita, Tetsuya;Hashimoto, Yuichi;Nagasawa, Kazuo;,期刊：Heterocycles, 页码：801-810 , 文章类型： 研究论文，,卷期：2008年76-1] Asym. epoxidn. of a,b-unsatd. ketones using acyclic hydroxyguanidine I as a new bifunctional organocatalyst is described. Hydroxyguanidine I promoted the reaction to give the corresponding epoxy ketones in good yields (... Design, synthesis and evaluation of antitumor and antiviral activities of 5-amino-1H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-ones (8-azaguanines) and 7-amino-1H-[1,2,3]triazolo[4,5-d]pyrimidin-5(4H)-ones (8-azaisoguanines). [作者：Islam, Rafiqul;Ashida, Noriyuki;Nagamatsu, Tomohisa;,期刊：Heterocycles, 页码：605-616 , 文章类型： 研究论文，,卷期：2008年76-1] Prepn. of 5-amino-1H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-ones and 7-amino-1H-[1,2,3]triazolo[4,5-d]pyrimidin-5(4H)-ones was accomplished by nitrosative cyclization of appropriate 2,5,6-triamino- and 4,5,6-triaminopyrim... Preparation of 1,3,3a,7a-tetrahydroisothianaphthene and its application to tetrahydrothiophene-fused porphyrin. [作者：Katsuyama, Yukiko;Yoshida, Eita;Uoyama, Hiroki;Ono, Noboru;Uno, Hidemitsu;,期刊：Heterocycles, 页码：667-678 , 文章类型： 研究论文，,卷期：2008年76-1] (Biomolecules and Their Synthetic Analogs) Section Dehydrobromination of 5,6-dibromoperhydroisothianaphthene with DBU gave a mixt. of 1,3,3a,7a and 1,3,3a,4-tetrahydroisothianaphthene in 5:1 ratio. The former compd. act... Regioselective double nucleophilic addition reaction leading to the synthesis of b-lactams. [作者：Takahashi, Atsushi;Kawai, Shiho;Hachiya, Iwao;Shimizu, Makoto;,期刊：Heterocycles, 页码：203-208 , 文章类型： 研究论文，,卷期：2008年76-1] b-Lactams were prepd. in a regio- and stereoselective manner using the double nucleophilic addn. of ketene silyl acetals and ketene silyl thioacetals to a,b-unsatd. imines followed by base-promoted cyclization. An attem... Enantioselective synthesis and proteasome inhibition of A-ring analogs of (-)-epigallocatechin gallate (EGCG), the active ingredient of green tea extract. [作者：Osanai, Kumi;Milacic, Vesna;Dou, Q. Ping;Chan, Tak Hang;,期刊：Heterocycles, 页码：485-505 , 文章类型： 研究论文，,卷期：2008年76-1] The A-ring analog (2R,3R)-I (R3' = R5' = OH) of (-)-EGCG, the active ingredient of green tea, and analog (2R,3R)-I (R3' = R5' = H) of natural catechin from Cistus salviifolius, as well as their (2S,3S)-enantiomers were s... Synthesis of highly oxygenated biphenyl derivative in an optically active form through palladium-mediated intramolecular biaryl coupling reaction. [作者：Abe, Hitoshi;Arai, Masatsugu;Nishioka, Keisuke;Kida, Tatsuya;Shioe, Kazuma;Takeuchi, Yasuo;Harayama, Takashi;,期刊：Heterocycles, 页码：291-303 , 文章类型： 研究论文，,卷期：2008年76-1] Optically active 6,6'-bis(hydroxymethyl)-2,2',3,3',4,4'-hexamethoxybiphenyl was prepd. via the Pd-mediated biaryl coupling reaction of a Ph benzoate deriv. and the following enantioselective lactone opening reaction. Carbon-carbon bond formation between enone and ester carbonyl group induced by samarium diiodide. [作者：Sono, Masakazu;Mizutani, Takayuki;Nozaki, Masayo;Takaoka, Shigeru;Tori, Motoo;,期刊：Heterocycles, 页码：851-860 , 文章类型： 研究论文，,卷期：2008年76-1] Reductive cyclization of Me, TBDMS, C6F5, CH2CCl3, or MOM ester of 4-(2-methyl-6-oxocyclohex-1-enyl)butanoate was attempted by treatment with SmI2, with or without additive (MeOH, H2O, HMPA, NiI2), to establish whether C... Palladium-catalyzed asymmetric intramolecular metallo-ene reaction using monodentate phosphines, 9-PBN and 9-NapBN. [作者：Hara, Osamu;Fujino, Hiroshi;Makino, Kazuishi;Hamada, Yasumasa;,期刊：Heterocycles, 页码：197-202 , 文章类型： 研究论文，,卷期：2008年76-1] The palladium-catalyzed asym. intramol. metallo-ene reaction of dienes using 9-PBN and 9-NapBN smoothly takes place in the presence of B(OAc)3 and/or NaBF4 at room temp. to afford the products with up to 51%ee, the best ... Synthesis of chiral (sulfinyl)furyl oxazoline ligands and its application to enantioselective palladium-catalyzed allylic alkylation. [作者：Bunya, Yusuke;Sengoku, Takaaki;Imamura, Yoko;Arai, Yoshitsugu;,期刊：Heterocycles, 页码：833-843 , 文章类型： 研究论文，,卷期：2008年76-1] Chiral ligands contg. an oxazoline substituent and a sulfur functionality at the furan ring were synthesized and examd. for enantioselective Pd-catalyzed allylic substitution reaction. The enantioselectivity obsd. was d... One step introduction of 4,4-bis(trifluoroacetyl)-1,3-butadiene system to aromatic rings using fluorine-containing 3,4-dihydro-2H-pyrans. A facile synthetic method for 1,1,1,5,5,5-hexafluoro-3-[(E)-3-arylallylidene]pentane-2,4-diones. [作者：Ota, Norio;Okada, Etsuji;Sonoda, Atsushi;Muro, Nobuyuki;Shibata, Dai;Medebielle, Maurice;,期刊：Heterocycles, 页码：215-219 , 文章类型： 研究论文，,卷期：2008年76-1] New 1,1,1,5,5,5-hexafluoro-3-[(E)-3-arylallylidene]pentane-2,4-diones were synthesized in moderate to high yields by ring-opening of 1-(2-ethoxy-4-isobutoxy-6-trifluoromethyl-3,4-dihydro-2H-pyran-5-yl)-2,2 ,2-trifluoroet... Staphylosides A and B. two new chromone diglucosides from leaves of Staphylea bumalda DC. [作者：Sueyoshi, Etsuko;Yu, Qian;Matsunami, Katsuyoshi;Otsuka, Hideaki;,期刊：Heterocycles, 页码：845-849 , 文章类型： 研究论文，,卷期：2008年76-1] Two new chromone diglucosides, staphylosides A and B, were isolated from the leaves of Staphylea bumalda DC., along with three known chromone glycosides. Their structures were elucidated by detailed inspection of NMR sp... Macropyllanosides A-D, secoiridoid glycosides from Hydrangea macrophylla subsp. serrata. [作者：Kikuchi, Masao;Kakuda, Rie;Yaoita, Yasunori;,期刊：Heterocycles, 页码：313-320 , 文章类型： 研究论文，,卷期：2008年76-1] Four new secoiridoid glycosides, named macrophyllanosides A-D, were isolated from the leaves of Hydrangea macrophylla subsp. serrata. Their structures have been detd. by spectroscopic and chem. means. LXR antagonists with a 5-substituted phenanthridin-6-one skeleton: synthesis and LXR transrepression activities of conformationally restricted carba-T0901317 analogs. [作者：Aoyama, Atsushi;Aoyama, Hiroshi;Dodo, Kosuke;Makishima, Makoto;Hashimoto, Yuichi;Miyachi, Hiroyuki;,期刊：Heterocycles, 页码：137-142 , 文章类型： 研究论文，,卷期：2008年76-1] Conformationally restricted heterocyclic analogs of carba-T0901317, a liver X receptor (LXR) antagonist, were prepd. via the palladium catalyzed cyclization reaction as a key step. In vitro transactivation assay reveale... Straightforward asymmetric total synthesis of (+)-evodiamine, a major indole alkaloid in herbal medicine, Wu Zhu Yu. [作者：Nakayama, Atsushi;Kogure, Noriyuki;Kitajima, Mariko;Takayama, Hiromitsu;,期刊：Heterocycles, 页码：861-865 , 文章类型： 研究论文，,卷期：2008年76-1] The concise asym. total synthesis of evodiamine, an indole alkaloid in Evodia Fructus, was achieved by employing Noyori's ruthenium(II)-catalyzed asym. transfer hydrogenation. Azinylferrocenes: synthesis and properties. [作者：Utepova, Irina A.;Chupakhin, Oleg N.;Charushin, Valery N.;,期刊：Heterocycles, 页码：39-72 , 文章类型： 综述，,卷期：2008年76-1] A review. The present review gives an account of the various synthetic routes to azinyl ferrocenes. Magnetic, catalytic, redox, physiol. active and other properties of these derivs. are considered.