Publications by authors named "Raj Kumar Bansal"

N-Heterocyclic carbenes (NHCs) are a special type of carbenes in which the carbene carbon atom is part of the nitrogen heterocyclic ring. Due to the simplicity of their synthesis and the modularity of their stereoelectronic properties, NHCs have unquestionably emerged as one of the most fascinating and well-known species in chemical science. The remarkable stability of NHCs can be attributed to both kinetic as well as thermodynamic effects caused by its structural features.

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The >C=P- or -N=P- functionality in 1,3-azaphospholo[1,5-]pyridine, named as 2-phosphaindolizine and its 1- and 3-aza derivatives act as dienophiles and undergo Diels-Alder reactions with 1,3-dienes. However, the dienophilic reactivity is affected by the nature of the substituent groups on the two sides of the σ,λ-P atom and also by the presence of more nitrogen atom(s) in the five-membered ring. The conceptual density functional theory (DFT) calculations have been used in recent years to predict the reactivity of organic molecules in reactions.

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Article Synopsis
  • Nitrogen-containing scaffolds are essential in organic synthesis, particularly for creating diverse bioactive compounds through the asymmetric aza-Michael reaction (aza-MR).
  • The synthesis of organocatalysts, which promote these reactions while adhering to 'Green Chemistry' principles, has gained attention and application, especially in the last two decades.
  • The review discusses various organocatalysts used in asymmetric aza-MR over the past decade, analyzing their mechanisms (non-covalent vs. covalent) and comparing their effectiveness, often highlighting high yields and enantiomeric excesses.
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This study examines the prevalence of suspected cervical cancer (established through the use of visual inspection with Lugol's Iodine - VILI) among outpatients attending Surat Municipal Institute of Medical Education & Research Hospital, India. A cross-sectional study was conducted on 356 patients; 178 with an established sexually transmitted disease (STD) and 178 patients without. Patients with positive results were investigated with cervical biopsy; out of 356 patients, 21.

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Introduction: Surat has the highest incidence of human immunodeficiency virus/acquired immune deficiency syndrome (HIV/AIDS) in Gujarat, the main reason being its large migrant population. Mental health in HIV/AIDS has most often been a topic of neglect all over the world. This study attempts to assess the magnitude of depression and the socio-demographic and clinical variables associated with it in HIV-positive patients.

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Background: As per the vaccine management policy of the Government of India all vaccine vials opened for an immunization session were discarded at the end of that session, irrespective of the type of vaccine or the number of doses remaining in the vial prior to 2013. Subsequently, open vial policy (OVP) was introduced in 2013 and should reduce both vaccine wastage as well as governmental healthcare costs for immunization. This study evaluates the vaccine wastage after introduction of the OVP and its comparison with the previous study of vaccine wastage in Surat city before implementation of OVP.

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Article Synopsis
  • The study explores how a specific phosphorus-containing complex reacts with dimethylbutadiene via the Diels-Alder reaction.
  • The reaction shows complete diastereoselectivity, leading to specific cycloadducts.
  • Computational calculations indicate that a group in the complex hinders one face of the reactivity, resulting in a lower activation barrier and a preference for the exo approach of the diene over the endo approach.
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