- Ytterbium(III) Triflate-Catalyzed Amination of 1-Cyclopropylprop-2-yn-1-ols as an Expedient Route to Conjugated Enynes.
[作者:Rao, Weidong;Zhang, Xiaoxiang;Sze, Ella Min Ling;Chan, Philip Wai Hong;,期刊:Journal of Organic Chemistry, 页码:1740-1743 , 文章类型: 研究论文,,卷期:2009年74-4]
- Ytterbium(III) triflate-catalyzed ring opening of substituted 1-cyclopropyl-2-propyn-1-ols with sulfonamides as an efficient synthetic route to conjugated enynes, e.g. PhCYCCPh:CHCH2CH2NHTs, is described herein. The rea...
- Biosynthetic Gene-Based Secondary Metabolite Screening: A New Diterpene, Methyl Phomopsenonate, from the Fungus Phomopsis amygdali.
[作者:Toyomasu, Tomonobu;Kaneko, Akane;Tokiwano, Tetsuo;Kanno, Yuya;Kanno, Yuri;Niida, Rie;Miura, Shigeyoshi;Nishioka, Taiki;Ikeda, Chiho;Mitsuhashi, Wataru;Dairi, Tohru;Kawano, Tomikazu;Oikawa, Hideaki;Kato, Nobuo;Sassa, Takeshi;,期刊:Journal of Organic Chemistry, 页码:1541-1548 , 文章类型: 研究论文,,卷期:2009年74-4]
- The presence of the geranylgeranyl diphosphate synthase (GGS) gene is a common feature of gene clusters for diterpene biosynthesis. We demonstrated identification of a diterpene gene cluster using homol.-based PCR of GG...
- Synthesis of Bicyclic 2'-Deoxynucleosides with a-L-ribo- and b-D-xylo-Configurations and Restricted S- and N-Type Conformations.
[作者:Shaikh, Khalil I.;Kumar, Surender;Lundhus, Lene;Bond, Andrew D.;Sharma, Pawan K.;Nielsen, Poul;,期刊:Journal of Organic Chemistry, 页码:1557-1566 , 文章类型: 研究论文,,卷期:2009年74-4]
- Two bicyclic 2'-deoxynucleoside analogs I and II are synthesized in 12 steps each from thymidine. With a six-membered ring fused to the C3'-C4' bond and an a-L-ribo- and a b-D-xylo-configuration, these are conformationa...
- Direct Amidation of Aldoses and Decarboxylative Amidation of a-Keto Acids: An Efficient Conjugation Method for Unprotected Carbohydrate Molecules.
[作者:Cho, Chia-Ching;Liu, Jia-Nan;Chien, Chung-Hsun;Shie, Jiun-Jie;Chen, Ying-Chu;Fang, Jim-Min;,期刊:Journal of Organic Chemistry, 页码:1549-1556 , 文章类型: 研究论文,,卷期:2009年74-4]
- With use of iodine as an appropriate oxidant, unprotected and unmodified aldoses undergo oxidative amidation with a variety of functionalized amines, a-amino esters, and peptides, whereas KDO, sialic acid, and other a-ke...
- A General Synthetic Route to Enantiopure 5-Substituted cis-Decahydroquinolines.
[作者:Amat, Mercedes;Fabregat, Robert;Griera, Rosa;Bosch, Joan;,期刊:Journal of Organic Chemistry, 页码:1794-1797 , 文章类型: 研究论文,,卷期:2009年74-4]
- A practical synthetic route to enantiopure 5-substituted cis-decahydroquinolines I [R = Me, (CH2)5OTBDPS, (CH2)3CO2Me, R1 = Boc; R= Me, R1 = H], has been developed, the key steps being a stereoselective cyclocondensation...
- Aziridination of C60 with Simple Amides and Catalytic Rearrangement of the Aziridinofullerenes to Azafulleroids.
[作者:Tsuruoka, Ryoji;Nagamachi, Toshiki;Murakami, Yuta;Komatsu, Mitsuo;Minakata, Satoshi;,期刊:Journal of Organic Chemistry, 页码:1691-1697 , 文章类型: 研究论文,,卷期:2009年74-4]
- The selective formation of aziridinofullerenes and azafulleroids, which are isomers of the fullerene derivs.-introduced N1 unit, is achieved. The ionic aziridination is a very convenient and risk-free procedure compared...
- Palladium-Catalyzed Annulation of Haloanilines and Halobenzamides Using Norbornadiene as an Acetylene Synthon: A Route to Functionalized Indolines, Isoquinolinones, and Indoles.
[作者:Thansandote, Praew;Hulcoop, David G.;Langer, Michael;Lautens, Mark;,期刊:Journal of Organic Chemistry, 页码:1673-1678 , 文章类型: 研究论文,,卷期:2009年74-4]
- A general procedure for the palladium-catalyzed annulation of substituted haloanilines with norbornadiene gives functionalized indolines in 51-98% yield. These indolines can be rapidly converted to benzenoid-substituted...
- A convenient synthesis of (S)-H4-BINOL and its derivatives via hydrogenation of monoesters of BINOL.
[作者:Li, Xinsheng;Ding, Qianchang;Ge, Jianfeng;Xie, Jianwu;Xu, Dongcheng;,期刊:Journal of Organic Chemistry, 页码:1785-1787 , 文章类型: 研究论文,,卷期:2009年74-4]
- A multigram synthesis of chiral (S)-H4-BINOL and its derivs. in moderate to high yield (up to 83% total yield) via monoesterification of (S)-BINOL, hydrogenation, and sapon. reaction was described. The two monomethylate...
- Cycloadditions of 1,1-Disubstituted Benzocyclobutenes Obtained by C(sp3)-H Activation.
[作者:Chaumontet, Manon;Retailleau, Pascal;Baudoin, Olivier;,期刊:Journal of Organic Chemistry, 页码:1774-1776 , 文章类型: 研究论文,,卷期:2009年74-4]
- An efficient synthesis of polycyclic mols., e.g., I, has been performed by a sequence involving palladium-catalyzed C-H activation and [4 + 2] cycloaddn. The intermediate benzocyclobutenes underwent a microwave-enhanced...
- Gosteli-Claisen Rearrangement: Substrate Synthesis, Simple Diastereoselectivity, and Kinetic Studies.
[作者:Rehbein, Julia;Leick, Sabine;Hiersemann, Martin;,期刊:Journal of Organic Chemistry, 页码:1531-1540 , 文章类型: 研究论文,,卷期:2009年74-4]
- The results of kinetic studies on the uncatalyzed [3,3]-sigmatropic rearrangement of 2-alkoxycarbonyl-substituted allyl vinyl ethers are reported. Apparently first reported by Gosteli in 1972, this variation of a Claise...
- Caging of Carbonyl Compounds as Photolabile (2,5-Dihydroxyphenyl)ethylene Glycol Acetals.
[作者:Kostikov, Alexey P.;Malashikhina, Natalia;Popik, Vladimir V.;,期刊:Journal of Organic Chemistry, 页码:1802-1804 , 文章类型: 研究论文,,卷期:2009年74-4]
- Aldehydes and ketones caged as 4-(2,5-dihydroxyphenyl)-1,3-dioxolanes are efficiently (F = 0.1-0.2) released in a good to excellent chem. yield upon irradn. with 300 nm light. Caged carbonyl compds. are prepd. by their ...
- Use of Bifunctional Ureas to Increase the Rate of Proline-Catalyzed a-Aminoxylations.
[作者:Poe, Sarah L.;Bogdan, Andrew R.;Mason, Brian P.;Steinbacher, Jeremy L.;Opalka, Suzanne M.;McQuade, D. Tyler;,期刊:Journal of Organic Chemistry, 页码:1574-1580 , 文章类型: 研究论文,,卷期:2009年74-4]
- The rate of the proline-catalyzed a-aminoxylation of aldehydes is significantly increased in the presence of a bifunctional urea. Structure-activity relationship data indicate that both an amine and a urea are crucial fo...
- Asymmetric Synthesis of Both Antipodes of b-Hydroxy Nitriles and b-Hydroxy Carboxylic Acids via Enzymatic Reduction or Sequential Reduction/Hydrolysis.
[作者:Ankati, Haribabu;Zhu, Dunming;Yang, Yan;Biehl, Edward R.;Hua, Ling;,期刊:Journal of Organic Chemistry, 页码:1658-1662 , 文章类型: 研究论文,,卷期:2009年74-4]
- Use of isolated carbonyl reductases in the redn. of arom. b-ketonitriles have completely eliminated the competing a-ethylation, which is often obsd. with whole cell biocatalysts. By choosing suitable recombinant carbony...
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