Articles written in Journal of Chemical Sciences
Volume 93 Issue 4 May 1984 pp 547-563 Organic Chemistry
Some applications of the intramolecular alkylation of α-diazomethyl ketones through metal-catalysed addition and insertion reactions, and acid-catalysed olefinic and aryl participations, towards the synthesis of a variety of complex polycyclic natural products have been briefly reviewed with special emphasis on the results reported from the authors’ laboratories. The possible mechanisms of the transition metal catalysed carbon-carbon bond forming reactions of carbenoids have been briefly discussed in the light of the recent literature.
Volume 100 Issue 2-3 April 1988 pp 235-252
Synthetic utility of trimethyl and triethyl orthoformates for carbon-carbon bond formation is briefly surveyed, particularly in relation to dialkoxymethylation, carbonyl transposition-homologation, and cycloalkenone annulation reactions recently reported from the authors’ and other laboratories. The complex mechanisms involved in the one-step and two-step annulations of rigid β,
Volume 118 Issue 3 May 2006 pp 223-235
Success of ring closure reactions of substrates having two terminal alkenes through olefin metathesis depends on a number of factors such as catalysts, nature and size of the rings to be formed and the substituents/functional groups present on the alkenes as well as at the allylic position. This article presents an overview of these influencing factors with illustrative examples.
Volume 122 Issue 6 November 2010 pp 791-800 Full Papers
An asymmetric route for the synthesis of highly functionalized 2,3-epoxy-
Volume 126 Issue 6 November 2014 pp 1875-1882 Regular Articles
Synthesis of a functionalized tricyclo[6.2.0.02,6]decane derivative in enantiomerically pure form, the core structure present in the natural products kelsoene and poduran, is described. The key steps involve a stereocontrolled copper (I)-catalyzed intramolecular [2+2] photocycloaddition of a 1, 6-diene prepared from D-mannitol to form a substituted bicyclo[3.2.0]heptane derivative and a ring closing olefin metathesis involving the vicinal substituents on the five-membered ring of the bicyclo[3.2.0]heptane derivative.
Volume 128 Issue 7 July 2016 pp 1019-1023 Regular Article
A convenient route for the synthesis of oxacyclobutapentalene, the tricyclic bridged core structure present in bioactive marine diterpene bielschowskysin and the polyketide hippolachnin A, is reported. The key steps involve ring closing metathesis of a triene derived from D-mannitol to produce selectively the dihydrofuran derivative instead of the cyclopentene derivative and a Cu(I)-catalyzed intramolecular [2+2]photocycloaddition of the dihydrofuran derivative.
Volume 129 Issue 12 December 2017 pp 1873-1881 REGULAR ARTICLE
Ring closing metathesis of acyclic trienes that can provide oxacycles or carbocycles has been investigated. It was found that a substituent on one of the alkene units determines the reaction course to provide either oxacycles or carbocyles exclusively irrespective of the ring size of the resulting compounds.
Volume 132 All articles Published: 31 October 2020 Article ID 0145
Development of a route for the synthesis of the core structure of galiellalactone is described. The key step involves a ring-closing enyne metathesis of an allyl propargyl ether to produce a dihydro furano diene with a latent dienophile. The dienophile, when generated from this latent functionality, underwent an in situ intramolecular Diels–Alder reaction to produce the tricyclic skeleton present in galiellalactone
Volume 134 All articles Published: 12 January 2022 Article ID 0009
Carbon nano onion (CNO) from dried grass has been synthesized by carbonization in the sizerange, 20 to 100 nm. This shows catalytic property to transform aerial oxygen under visible light to generatereactive oxygen species (ROS). A concept has been presented herein to show that this CNO even under roomlight generates hydrogen peroxide which inhibits WSN influenza virus (H1N1). The advantage of introducingCNO, synthesized from a cheap source to cater to the global need, is to sterilize infected hospitals indoor andoutdoor, aircraft carriers, air conditioner vents due to its sustained conversion of air to ROS. Thus, CNO usecould prevent frequent evacuation as used by conventional sanitisers to sterilize infected places from otherRNA virus and hospital pathogens under COVID-19 pandemic.
Carbon nano onion (CNO) under aerial oxygen on exposure with visible light generates ROS which is capable to rupture the lipid envelope of SARS-CoV-2 followed by disintegrating its RNA.
Volume 135, 2023
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