- A heteroatom-containing aromatic vinyl compound (by machine translation)
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[Problem] heteroatom containing aromatic vinyl compound at high purity, high yield manufacturing method capable of manufacturing. (I) formula [a]: R1 - R2 - Y (where, R1 A specific aromatic group, R2 The Si (Rs
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Paragraph 0075; 0077
(2019/10/23)
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- Cobalt-Mediated [2+2+2] Cycloadditions of Alkynes to Benzo-[ b ]furans and Benzo[ b ]thiophenes: A Potential Route toward Morphanoids
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Exploratory studies of the CpCo-mediated [2+2+2] cycloaddition of alkynes to the 2,3-double bond of benzo[ b ]furans (and some benzo[ b ]thiophenes) are presented, with the general aim to access morphinan substructures. The basic feasibility of constructing Co-complexed tetrahydrophenanthro[4,5- bcd ]furans (and -thiophenes) in moderate to good yields is demonstrated, with complete to extensive diastereoselectivity. Limitations are the apparent necessity for bulky (silylated) monoalkynes, the lack of regioselectivity in the cocyclization with unsymmetrical alkynes, and the sensitivity of the ligands, both complexed and uncomplexed, with respect to ring opening and rearrangement.
- Aechtner, Tobias,Barry, David A.,David, Ellen,Ghellamallah, Cédric,Harvey, Daniel F.,De La Houpliere, Alix,Knopp, Monika,Malaska, Michael J.,Pérez, Dolores,Sch?rer, Kaspar A.,Siesel, Brian A.,Vollhardt, K. Peter C.,Zitterbart, Robert
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p. 1053 - 1089
(2017/12/28)
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- 1,3 DIHYDROFURO [3,4-c]PYRIDINES AND THEIR PREPARATION
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The present invention relates to novel 1,3-dihydrofuro[3,4-c]pyridines which are useful intermediates in the synthesis of pyridoxines and a method for their preparation by cobalt(I) complex-catalysed [2 + 2 + 2]-cycloaddition of di-[(3-dimethyl-C1-4-alkoxysilyl)-2-propynyl)] ethers with acetonitrile.
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Page/Page column 6
(2010/02/14)
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- Regioselective alkylation of 1-silyl-2-methylallyl carbanions
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Regioselective alkylations of 1-silyl-2-methylallyl carbanions were achieved by changing the substituents on silicon. γ-Alkylation was favoured by dialkylamino group on silicon, whereas α-alkylation was favoured by an alkoxy substituent on silicon.
- Li,Wang d.
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p. 2879 - 2882
(2007/10/02)
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