Detail of "1696-20-4"

Reference

Preparation of acetylmorpholine

Preparation of acetylmorpholine. Kang, Zhuo; Wang, Canming; Liu, Changling; Wang, Fengyu ( Shenyang Chemical Institute, Peop. Rep. China). Faming Zhuanli Shenqing Gongkai Shuomingshu CN 1403449 A 19 Mar 2003, 6 pp. (Chinese). (People's Republic of China).Several substances with their cas registry numbers 1696-20-4 and 64-19-7 may be metioned in this study. CODEN: CNXXEV. CLASS: ICM: C07D295-185. APPLICATION: CN 2001-128158 13 Sep 2001. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Acetylmorpholine is prepd. by the reaction of morpholine with acetic anhydride (at a molar ratio of 1:1) in acetic acid under refluxing for 2-3 h. .

Effects of substitution on nitrogen on barriers to rotation of amides

Effects of substitution on nitrogen on barriers to rotation of amides. 2 - Evaluation of the importance of resonance effects. Pinto, B. Mario; Szarek, Walter A.; Grindley, T. Bruce (Carbohydrate Res. Inst., Queen's Univ., Kingston, ON K7L 3N6, Can.). Org. Magn. Reson., 22(11), 676-92 (English) 1984. CODEN: ORMRBD. 1696-20-4 is the cas registry number of certain chemical which is used as reagents here. ISSN: 0030-4921. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Analogs of N-acetyl- and N-benzoyl-azacyclohex-2-enes having an oxygen atom, a methylene-d2 group or a carbonyl group in place of the C-4 methylene group (I; R = Me, Ph; II; X = CO, R = Me, Ph; X = CD2, R = Me, Ph) have been synthesized. The amide rotational barriers in these compds. have been measured by the total line-shape anal. of variable-temp. 1H NMR spectra. The free energies of activation for both the N-acetyl and N-benzoyl series decrease in the sequence O x CD2 > CO. .