Journal of Organic Chemistry p. 4931 - 4938 (1994)
Update date:2022-08-11
Topics:
Tang, Jiansheng
Mohan, Thyagarajan
Verkade, John G.
With concentrations as low as 0.0033 mol percent ZP(MeNCH2CH2)3N (Z = lone pair, 1) isocyanates are catalytically trimerized to perhydro-1,3,5-triazine-2,4,6-triones (isocyanurates) at room temperature.This reaction proceeds readily in the presence or absence of solvent, and the catalyst can be recycled at least six times without detectable degradation.Though not as potent a catalyst as 1, the molecule in which Z = NPh (3) also facilitates this reaction, and evidence is adduced that the catalytically active species is the adduct 3*ArNCO (6).In contrast, Ch=P(MeNCH2CH2)3N (Ch = O, 4; Ch = S, 5) selectively catalyze the transformation of isocyanates to carbodiimides and do so more efficiently than their acyclic analogues O=P(NMe2)3 and (MeO)2P(S)Ph, respectively.The crystal structure of 4 is reported for the first time, and details of the crystal structure of
Sanming Coffer Fine Chemical Industrial Co., Ltd
website:http://www.cofferxm.com/
Contact:+86-598-5853979
Address:Jin-sha Yuan Chuang-ye Park,Hi-Tech Development Zone,Sanming City P.R.China
hangzhou verychem science and technology co.ltd
website:http://www.verypharm.com
Contact:+86-571-88162785; 88162786
Address:F1502, 753 Shenhua road, Hangzhou, China
Jinan Boss Chemical Industry Co., Ltd.
website:http://www.chemboss.com.cn
Contact:+86-531-58591595
Address:No2.Hualong Road, Jinan, China
Taizhou Elitechemie MediPharma Technology Co.,Ltd.
Contact:+86-523-86810021
Address:Building G14,NO.1 Avenue,China Medical City, Taizhou, Jiangsu,China
WENZHOU M&C FOREIGN TRADE CO.,LTD.
Contact:+86-577-88862917
Address:No.8 Liming West Road,Wenzhou,zhejiang,China
Doi:10.1007/s11164-018-3382-4
(2018)Doi:10.1007/s00044-018-2154-4
(2018)Doi:10.1007/s11164-017-3168-0
(2018)Doi:10.1016/0009-3084(78)90068-3
(1978)Doi:10.1016/j.jorganchem.2017.05.029
(2017)Doi:10.1016/j.tetlet.2009.04.065
(2009)