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Questions related from Myungjo J. Kim
Hi! I'm trying to reproduce the known recrystallization of an organic compound. ( doi.org/10.1016/S0040-4039(96)02334-9 , doi.org/10.1021/op060204l ) As you can see in these papers, ketalization...
24 March 2018 2,499 3 View
I have a terminal olefin bearing an allene moiety(they're quite far apart) in hand. I'm meant to functionalise this olefin to enones or vinyl esters. But, as expected, its coupling with acrylates...
30 June 2017 2,741 3 View
One of my references includes a procedure using excess amount(5eq.) of hydrogen peroxide(H2O2). (with NaOH 0.5eq. in methanol) I usually quench it during workup with sat. sodium...
18 February 2017 1,028 8 View
I'm thinking of using dry CeCl3 to make organocerium reagent from alkyl lithium. I have Aldrich anhydrous CeCl3 in my hand now, which appears to be nonsticky bead-type(free-rolling). I wonder if...
30 October 2016 3,834 2 View
We often say NaH is moisturized when its color is changed from gray to white. When it comes to KH, Potassium Hydride, can anyone help me judging whether it's moisturized or not in terms of...
26 May 2016 859 3 View
As known, Grubbs Catalyst (2nd generation) has high solubilities toward organic solvents. Whenever I try to remove it by standard workup procedure or by celite filtration, residues still have...
08 November 2015 2,075 5 View
How do you judge whether NaH dispersion(60%) is moisturized or not? To the best of my knowledge, skyblue color is its standard color and white color implies that it's moisturized or...
23 March 2015 7,518 5 View
When you keep your compound or crude mixture in a fridge, which way do you prefer? and why? There have been a lot of controversy with this issue all the time, but it's still not well-concluded I...
08 January 2015 3,470 6 View
One of my reaction procedures used the eluent system of Acetone and Hexane for their column chromatography. (They used Acetone/HX = 1/30) But I usually use EA/HX or Ether/HX system in the lab. Can...
29 April 2014 3,757 1 View