[kimyacı]

 Hi all,
while ı am studying protecting group chemistry, ı see (lm)2 CO in the protecting of diols. I dont know what this is.I looked at internet but ı couldnt find.If anyone knows this,please inform me
 Thanks in advance

[Doc Oc]

Carbonyl diimidazole.  Like phosgene but without the nasty effect on your well-being.

[AWK]

http://www.chemdrug.com/databases/9_0_fstbrjtweickkjqq.html

[kimyacı]

 Thanks a lot dear J-bone

[AWK]

Carbonyl diimidazole.  Like phosgene but without the nasty effect on your well-being.

But reagent is prepared from fosgene by peoples in other place

[pacifyer]

Carbonyl diimidazole.  Like phosgene but without the nasty effect on your well-being.

But reagent is prepared from fosgene by peoples in other place

Or from safer triphosgene, perhaps... 

[OC pro]

But not on an industrial scale. Just compare the prizes. Triphosgene is not much less toxic than phosgene itself. It is just a bit easier to handle.

[pacifyer]

But not on an industrial scale. Just compare the prizes. Triphosgene is not much less toxic than phosgene itself. It is just a bit easier to handle.

Triphosgene is MUCH less toxic than phosgene, and as long as you do not use it to generate phosgene, you will be ok. Phosgene is a sever irritant, and you must handle it in a hood, and with due respect and love. You should keep it in a tightly closed container and far from water.
I would not buy it, but prepare it, instead, it is not that hard, and as triphosgene is solid, it is pretty easy to handle and convenient to use. I this way I could be sure of the stuff, and its quality and purity... You can always make only what will be needed, and use it as limiting reagent.

I think you should take a look at:
Cotarca, L.; Delogu, P.; Nardelli, A.; Sunjic, V. Synthesis 1996, 553.

Also, for some applications
http://www.sigmaaldrich.com/etc/medialib/docs/Aldrich/Bulletin/al_techbull_al176.Par.0001.File.tmp/al_techbull_al176.pdf

Hope it helps.