A New Synthesis of Vitamin A2 : Conversion of Vitamin A1 to A2

Barua, R. K.; Nair, M. G.

doi:10.1038/193165a0

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…Barua et al used this reagent in the synthesis of vitamin A 2 . 898 In this synthesis an extra double bond was introduced into the β-ionone ring of the methyl ester of vitamin A 1 acid by bromination with NBS, followed by dehydrobromination with 4-phenylmorpholine. An efficient and convenient new method was developed for the preparation of bromoallenes from propargyl alcohols by a reagent combination of NBS and PPh 3 in moderate to good yields with regioselectivity.…”

Section: Aromatic Bromination Using Nbsmentioning

confidence: 99%

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Use of Bromine and Bromo-Organic Compounds in Organic Synthesis

2016

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Bromination is one of the most important transformations in organic synthesis and can be carried out using bromine and many other bromo compounds. Use of molecular bromine in organic synthesis is well-known. However, due to the hazardous nature of bromine, enormous growth has been witnessed in the past several decades for the development of solid bromine carriers. This review outlines the use of bromine and different bromo-organic compounds in organic synthesis. The applications of bromine, a total of 107 bromo-organic compounds, 11 other brominating agents, and a few natural bromine sources were incorporated. The scope of these reagents for various organic transformations such as bromination, cohalogenation, oxidation, cyclization, ring-opening reactions, substitution, rearrangement, hydrolysis, catalysis, etc. has been described briefly to highlight important aspects of the bromo-organic compounds in organic synthesis.

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Section: Aromatic Bromination Using Nbsmentioning

confidence: 99%

“…Barua et al used this reagent in the synthesis of vitamin A 2 . In this synthesis an extra double bond was introduced into the β-ionone ring of the methyl ester of vitamin A 1 acid by bromination with NBS, followed by dehydrobromination with 4-phenylmorpholine.…”

Section: Bromination Reactionsmentioning

confidence: 99%

Use of Bromine and Bromo-Organic Compounds in Organic Synthesis

2016

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“…By the beginning of our study (April 27), the country had more than 50,000 cases and as of June 2021, with more than 465,000 deaths, Brazil continues as one of the worst affected countries globally. The pandemic also strongly affected an already fragile economy, leading to an overall contraction of the economy of 4.4% in 2020 ( Barua & Samaddar, 2021 ). Brazil prior to the pandemic had gone through a number of economic crises and has one of the highest economic inequality rates globally ( World Bank, 2017 ).…”

Section: The Research Contextmentioning

confidence: 99%

Values and COVID-19 worries: The importance of emotional stability traits

Fischer

Bortolini

Pilati

et al. 2021

Personality and Individual Differences

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We examined the relationship between emotional stability as a more stable personality trait and COVID-related worries with basic human values in a Brazilian sample (N = 578) that is strongly affected by COVID-19. We tested whether emotional stability would moderate the effect of infection and economic worries on personal values. In line with predictions, we found that infection worries were more strongly related to Security values, especially among individuals with less emotional stability, whereas economic worries were more strongly correlated with Power values, in particular among individuals with less emotional stability. Findings for Achievement values suggested perceived behavioral control effects for individuals high in Emotional Stability. Our findings provide insights into possible longer-term psychological effects of the current pandemic. Emotional dynamics in connection with worries created by the pandemic could influence values of importance for societal functioning in the short to medium term.

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Enzymatic cleavage of carotenoids

Singh

Cama

1974

Biochimica et Biophysica Acta (BBA) - Enzymology

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A New Synthesis of Vitamin A2 : Conversion of Vitamin A1 to A2

Cited by 5 publications

References 8 publications

Use of Bromine and Bromo-Organic Compounds in Organic Synthesis

Use of Bromine and Bromo-Organic Compounds in Organic Synthesis

Values and COVID-19 worries: The importance of emotional stability traits

Enzymatic cleavage of carotenoids

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