Monthly Archives: August 2012

Chiloglottone –Australian orchid uses a single simple diketone to attract wasps that pollinate it

  The Australian orchid Chiloglottis trapeziformis' very existence hinges upon there being some truth to the old adage that love is blind. Unlike other flowers, which lure pollinators with nectar, C. trapeziformis attracts its pollinator, the thynnine wasp Neozeleboria cryptoides, … Continue reading

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2′-Hydroxychalcone to Flavanone: Asymmetric Catalysis

http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201200838/abstract Asymmetric Ion-Pairing Catalysis of the Reversible Cyclization of 2′-Hydroxychalcone to Flavanone: Asymmetric Catalysis of an Equilibrating Reaction Lukas Hintermann and Claudia Dittmer    The cyclization of nonactivated 2′-hydroxychalcones to flavanones has been realized for the first time with asymmetric … Continue reading

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COLOURFUL MECHANISMS-ACADEMIC HELP

Epoxidation OZONOLYSIS oxidations DIELS ALDER RXN We noted earlier that addition reactions of alkenes often exhibited STEREOSPEFICITY, in that the reagent elements in some cases added syn and in other cases anti to the the plane of the double bond. … Continue reading

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Cram’s rule

The Cram’s rule of asymmetric induction developed by Donald J. Cram in 1952,  is an early concept relating to the prediction of stereochemistry in certain acyclic systems. In full the rule is: In certain non-catalytic reactions that diastereomer will predominate, which … Continue reading

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HOECHST MARION ROUSSEL

I WAS A PART PROCESS DEVELOPMENT LAB , MULUND, MUMBAI, INDIA, HEAD,  DR RALPH STAPEL IN CENTRE

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CUBANE SYNTHESIS

CubaneCubane (C8H8) is a synthetic hydrocarbon molecule that consists of eight carbon atoms arranged at the corners of a cube, with one hydrogen atom attached to each carbon atom. A solid crystalline substance, cubane is one of the Platonic hydrocarbons. … Continue reading

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