Search Results - "Dabdoub, Miguel J."

Niobium to alcohol mol ratio control of the concurring esterification and etherification reactions promoted by NbCl5 and Al2O3 catalysts under microwave irradiation by BARBOSA, Sandro L, HURTADO, Gabriela R, KLEIN, Stanlei I, JUNIOR, Valdemar L, DABDOUB, Miguel J, GUIMARAES, Carlos F

“…Alcohols and acids can be switched to produce ethers or esters by varying the alcohol to catalyst mol ratio, in a new etherification and esterification method…”
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Hydrozirconation of Stannylacetylenes. Synthesis and Reactions of Ketene Stannyl(Telluro) Acetals by Dabdoub, Miguel J, Baroni, Adriano C. M

“…Stannylacetylenes 7a − e react with Cp2Zr(H)Cl in THF at room temperature to give the α-zirconated vinylstannane intermediates 8a − e, which subsequently react…”
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Solvent free esterification reactions using Lewis acids in solid phase catalysis by Barbosa, Sandro L., Dabdoub, Miguel J., Hurtado, Gabriela R., Klein, Stanlei I., Baroni, Adriano C.M., Cunha, Christielle

“…A clean, efficient and fast method for esterification reactions for sterically (biodiesels) or otherwise inactive (aromatic) precursors was developed, using…”
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Hydroalumination of phenylthioacetylenes. Synthesis and reactions of ( Z )- and ( E )-1-butyltelluro-1-phenylthio-1-alkenes by Dabdoub, Miguel J, Guerrero, Palimécio G

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Synthesis of arotinoid acid and temarotene using mixed (Z)-1,2-bis(organylchalcogene)-1-alkene as precursor by Guerrero, Palimécio G., de Oliveira, Paulo R., Baroni, Adriano C.M., Marques, Francisco A., Labes, Ricardo, Hurtado, Gabriela R., Dabdoub, Miguel J.

“…An efficient and novel total synthesis of the two bioactive retinoids temarotene and arotinoid acid (TTNPB) is described. The key steps in this process include…”
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One-pot synthesis of telluroketene acetals and haloketene acetals using sp2 geminated hetero organobismetallic intermediates by Guerrero, Palimécio G., de Oliveira, Paulo R., Baroni, Adriano C.M., Marques, Francisco A., Labes, Ricardo, Dabdoub, Miguel J.

“…A novel one-pot synthesis of 1,1-dihalo-1-alkenes and 1,1-bis(butyltelluro)-1-alkenes was developed from hydrozirconation of alkynylzinc bromide with…”
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Synthesis of naturally occurring diene and trienes by Te/Li exchange on (1 Z,3 Z)-butyltelluro-4-methoxy-1,3-butadiene by Dabdoub, Miguel J., Dabdoub, Vânia B., Baroni, Adriano C.M., Hurtado, Gabriela R., Barbosa, Sandro L.

“…(1 Z,3 Z)-Butyltelluro-4-methoxy-1,3-butadiene 2 was obtained by the hydrotelluration of ( Z)-1-methoxy-but-1-en-3-ynes 1. The butadienyllithium 3 obtained by…”
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Synthesis of (Z)-tributylstannyl enynes: systematic studies of Sonogashira cross-coupling reactions between (E)-1-iodovinyl-1-tributylstannanes and terminal acetylenes using amines or tetrabutylammonium hydroxide (TBAOH) as activator by Nazario, Carlos E.D., Santana, Amanda S., Kawasoko, Cristiane Y., Carollo, Carlos A., Hurtado, Gabriela R., Viana, Luiz H., Barbosa, Sandro L., Guerrero, Palimécio G., Marques, Francisco A., Dabdoub, Vânia B., Dabdoub, Miguel J., Baroni, Adriano C.M.

“…Sonogashira cross-coupling reactions involving (E)-iodo vinyl stannanes and terminal acetylenes were carried out in the presence of Pd(PPh3)4, CuI and several…”
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Four- and Eight-Carbon Homologation of Benzaldehyde by (1Z,3Z)-Butyltelluro-1,3-Butadiene: Synthesis of Navenone B: Alarm Pheromone of the Mollusk Navanax inermis by Dabdoub, Miguel J., Dabdoub, Vânia B., Baroni, Adriano C. M., Barbosa, Sandro L.

“…Four- and eight-carbon homologation of benzaldehydes is described. The hydrotelluration of (Z)-1-methoxy-but-1-en-3-ynes 1 afforded…”
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Hydrotelluration of acetylenes: synthesis of vinylic tellurides, divinyl tellurides, and 1-(organyltelluro)-1,3-butadienes by Barros, Simone M, Dabdoub, Miguel J, Dabdoub, Vania M. B, Comasseto, Joao V

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Synthesis of ( Z)-1-phenylseleno-1,4-diorganyl-1-buten-3-ynes: hydroselenation of symmetrical and unsymmetrical 1,4-diorganyl-1,3-butadiynes by Dabdoub, Miguel J, Baroni, Adriano C.M, Lenardão, Eder J, Gianeti, Thiago R, Hurtado, Gabriela R

“…The hydroselenation of 1-organyl-1,3-butadiynes and 1,4-diorganyl-1,3-butadiynes with the sodium phenylselenolate anion, which was generated in situ by…”
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Hydrozirconation of Stannylacetylenes:  A Novel and Highly Efficient Synthesis of 1,1-Diiodo-, 1,1-Dibromo-, and Mixed (Z)- or (E)-1-Iodo-1-bromo-1-alkenes Using 1,1-Hetero-Bimetallic Reagents by Dabdoub, Miguel J, Dabdoub, Vânia B, Baroni, Adriano C. M

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Hydrochalcogenation of phenylthioacetylenes. Synthesis of mixed ( Z)-trisubstituted 1,2-bis(organylchalcogeno)-1-alkenes by Dabdoub, Miguel J, Dabdoub, Vânia B, Pereira, Marco A

“…The treatment of 1-phenylthioacetylenes with phenylselenolate and butyl or phenyltellurolate anions generated by the reaction of the corresponding…”
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Palladium-catalyzed cross-coupling reactions of dimethyl- and diethylzinc with unsaturated organotellurium compounds by Dabdoub, Miguel J, Dabdoub, Vânia B, Marino, Joseph P

“…The cross-coupling reaction of diethyl- or dimethylzinc compounds with disubstituted vinylic tellurides as electrophilic partners is described. These…”
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Hydrozirconation of Lithium Alkynylselenolate Anions. Generation and Reactions of α-Zirconated Vinyl Selenide Intermediates by Dabdoub, Miguel J, Begnini, Mauro L, Guerrero, Palimécio G, Baroni, Adriano C. M

“…Lithium alkynylselenolate anions react completely with 1.0 equiv of Cp2Zr(H)Cl in THF at room temperature to give exclusively the α-zirconated vinylselenolate…”
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Synthesis of ketene (S, Te)acetals and their transformation into Z- α-phenylthio-α,β-unsaturated aldehydes by Silveira, Claudio C, Perin, Gelson, Braga, Antonio L, Dabdoub, Miguel J, Jacob, Raquel G

“…Reaction of thiomethyl phosphonates with aryl (or butyl) tellurenyl halides and aldehydes under basic conditions provides moderate to good yields of ketene…”
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Highly chemoselective triple bond reductions on unsymmetrical 1,4-diorganyl-1,3-butadiynes by Dabdoub, Miguel J, Dabdoub, Vânia B.

“…Unsymmetrical 1.4-diorganyl-1,3-butadiyncs la-g undergo rcgio-, stereo- and chemoselective addition of butyltcllurolatc anion leading to (…”
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Synthesis of 1-methyl-4-alkyl-1,3-diacetylenes. Prototropic rearrangement in 1-alkyl-1,3-diacetylenes by Dabdoub, Miguel J, Dabdoub, Vânia B, Lenardão, Eder J

“…Treatment of 2-methyl-2-hydroxy-6-alkyl-3,5-diacetylenes with powdered NaOH was used for the synthesis of terminal 1-alkyl-1,3-butadiynes that can be isolated…”
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Phenyltelluroacrylonitriles and phenylselenoacrylonitriles as precursors of ( Z)-α-phenylseleno-α,β-unsaturated aldehydes, β-amino-α-phenylselenonitriles and Diels–Alder adducts by Silveira, Claudio C, Perin, Gelson, Braga, Antonio L, Dabdoub, Miguel J, Jacob, Raquel G

“…Reaction of cyanomethylphosphonate with aryl selenenyl (or tellurenyl) halides and aldehydes, under basic conditions, provides α-phenylseleno or…”
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Iodocyclization of (Z)-1-(Butyltelluro)-1,4-diorganylbut-1-en-3-ynes. Synthesis and Reactions of 3-Iodotellurophenes by Dabdoub, Miguel J, Dabdoub, Vânia B, Pereira, Marco A, Zukerman-Schpector, Julio

“…The iodocyclization of (Z)-tellurobutenynes 5a − g by reaction with I2/petroleum ether was studied in detail. 3-Iodotellurophenes 7a − f were formed, and…”
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