Avtar Singh

6 Questions 26 Answers 0 Followers

Questions related from Avtar Singh

Why there is so much difference in enantiomeric excess (%ee)?

We have synthesized a number of chiral secondary alcohols ( like (-)-1-phenylethanol and its derivatives) from the prochiral ketones (from acetophenone and its derivatives) using NaBH4 as the...

23 January 2018 9,479 5 View

Which out of the two Nitrogen atoms of the 4-(Dimethylamino)pyridine is more susceptible for alkylation?

If we use the equimolar quantity of the alkyl halide and 4-(Dimethylamino)pyridine then which of the two Nitrogen atoms of 4-(Dimethylamino)pyridine will be alkylated? is there any theoretical...

14 October 2017 9,161 5 View

Procedure for N-alkylation of Piperidine?

Can anyone please suggest me the exact procedure for N-alkylation of piperidine.

16 March 2017 4,204 9 View

What are the pssible reasons for reduced activity/selectivity of a recovered catalyst?

In any catalytic reaction if we use the recovered catalyst again (in the same reaction); then in most of the cases diminished reactivity or selectivity of the catalyst is observed. why its so?

12 November 2016 6,936 4 View

Any method for the methylation of Hydroquinone?

we are trying for methylation of hydroquinone. Please suggest any method for that.

07 November 2016 6,026 3 View

There may be a significant time difference between retention times for two enantiomers of a compound and the racemic mixture?

We are determining the enantiomeric excess by NP-HPLC (using Chiralcel OD-H column employing Hexane:IPA solvent system). The product of racemic reaction show two peaks at Retention Time 18 and 20...

13 October 2016 5,543 5 View