834. Optical rotatory dispersion. Part XXII. Steroidal azomethines

Bonnett, R.; Emerson, T. R.

doi:10.1039/jr9650004508

Cited by 23 publications

(3 citation statements)

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“…In addition, the removal of released water is necessary to shift this reversible reaction to completion. For the synthesis of sterically hindered ketimines bearing one or two aromatic groups, the application of drying agents such as molecular sieves [18] or TiCl 4 [19] has been described. All reactions of racemic 3 with (S)-α-PEA were carried out in refluxing toluene, with water removed by a DeanϪStark trap filled with MgSO 4 .…”

Section: Resolution Of 3 Attempted Resolution Of 4 and Determinatiomentioning

confidence: 99%

Regioselective Fries Rearrangement and Friedel−Crafts Acylation as Efficient Routes to Novel Enantiomerically Enrichedortho-Acylhydroxy[2.2]paracyclophanes

et al. 2000

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Two useful approaches to ortho-acylhydroxy[2.2]paracyclophanes, starting from 4-hydroxy[2.2]paracyclophane, have been developed. TiCl 4 -catalyzed Fries rearrangement and direct acylation occur regioselectively (to the ortho position with respect to the hydroxy group), leading to 4-acetyl-5-hydroxy[2.2]paracyclophane (3) and 4-benzoyl-5-hydroxy[2.2]-[a] A. N. Nesmeyanov Institute of Organoelement Compounds, 3295 paracyclophane (4) in high to excellent chemical yields. For compound 4, an X-ray investigation has been performed. ortho-Acylhydroxy[2.2]paracyclophanes 3 and 4 have been obtained in enantiomerically enriched forms (ee 92−99%) and the absolute configurations of their enantiomers have been determined. parative routes to enantiomerically enriched ortho-acylhydroxy[2.2]paracyclophanes were elaborated.

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Section: Resolution Of 3 Attempted Resolution Of 4 and Determinatiomentioning

confidence: 99%

Regioselective Fries Rearrangement and Friedel−Crafts Acylation as Efficient Routes to Novel Enantiomerically Enrichedortho-Acylhydroxy[2.2]paracyclophanes

et al. 2000

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“…Thus they are not only used as adsorbents or desiccants, but also as catalyst in several organic reactions. It is used for trans-esterification, preparation of enamines, ketimines [15,16], synthesis of acetals [17], Oxidation of 2° alcohols [18]. The importance of molecular sieves in heterogeneous catalysis depends of its micro-porous structure.…”

Section: Introductionmentioning

confidence: 99%

Molecular Sieves as a New, Highly Efficient, Inexpensive and Reusable Catalyst for N-Ter-Butoxycarbonylation of Amines

Durvasula¹,

Khanna²

2015

Organic Chem Curr Res

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“…Catálise ácida é sempre recomendada e a remoção de água, neste caso, é estritamente necessária para se obter rendimentos relativamente altos. Agentes dessecantes podem ser empregados, tais como: TiCl 4 130 e peneira molecular 131 . Métodos para melhorar a reatividade de cetonas foram trabalhados por Eisch e Sanchez 132 .…”

Section: Iminasunclassified

Redução, oxidação e cicloadição de compostos nitrogenados buscando a síntese de intermediários de fármacos

Mendes¹

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A "Aquele que, com seu Compasso, marcou os limites do mundo, e determinou, dentro deles, tudo o que é visível e tudo o está oculto." À presença autêntica de meu pais, Ângela e Raimundo; irmãos, João Robinson e Fanka; avós, Robinson e Áurea; tia-avó Neyna; e aos tios e primos, pelo incentivo. Aos Profs. Drs. Antônio Aarão Serra e Jayne Carlos de Souza Barboza, pela orientação, pelo suporte afetivo, pela convivência familiar, pelo exemplo de dignidade e humanidade. Aos antigos mestres, especialmente, Profs. Drs. Ivoní de Freitas Reis e João Batista Alves dos Reis, por me introduzirem no encantamento da filosofia natural (química e física), e à professora Marilene Godinho, pela introdução às belas-letras. Aos Profs. Drs. Amilton Martins dos Santos, George Jackson de Moraes Rocha, Adilson Roberto Gonçalves, e aos colegas do Laboratório de Polímeros e do Laboratório de Conversão de Biomassa Vegetal, pelos conhecimentos compartilhados nos tempos das Iniciações Científicas.Aos colegas da BASF, em especial ao Sandro, pelo exemplo profissional e pessoal, pelos feedbacks, pela confidência, e pela hospitalidade, e ao Juraci, pelos exemplos de perspicácia, maturidade, ética, respeito, competência, liderança e amizade.Aos companheiros das repúblicas. Aos colegas do Laboratório de Química Fina. Aos antigos amigos de Minas Gerais. Aos novos amigos de São Paulo. Ao Amigo Dr. Celso Charuri."Verum sine mendacio, certum et verissimum: quod est inferius est sicut quod est superius, et quod est superius est sicut quod est inferius, ad perpetranda miracula rei unius."

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834. Optical rotatory dispersion. Part XXII. Steroidal azomethines

Cited by 23 publications

References 0 publications

Regioselective Fries Rearrangement and Friedel−Crafts Acylation as Efficient Routes to Novel Enantiomerically Enrichedortho-Acylhydroxy[2.2]paracyclophanes

Regioselective Fries Rearrangement and Friedel−Crafts Acylation as Efficient Routes to Novel Enantiomerically Enrichedortho-Acylhydroxy[2.2]paracyclophanes

Molecular Sieves as a New, Highly Efficient, Inexpensive and Reusable Catalyst for N-Ter-Butoxycarbonylation of Amines

Redução, oxidação e cicloadição de compostos nitrogenados buscando a síntese de intermediários de fármacos

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