80-52-4Relevant articles and documents
Method for preparing 1 and 8 - P-menthane diamine from 1 and 8 - P-menthane diethanolamide
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Paragraph 0007; 0021; 0036-0063, (2021/03/03)
The invention discloses a method for preparing 1,8-paramylenediamine from 1,8-paramenthane diethylamide. The method comprises the steps: dissolving raw material 1,8-paramenthane diethylamide togetherwith an inorganic strong alkali in an organic solvent, in a sealed reaction kettle with the pressure of 0 MPa-2.0 MPa, carrying out a reaction for 10 h-20 h at the temperature of 150 DEG C-200 DEG C,filtering the reaction liquid, washing with water and distilling to obtain the product 1,8-paramylenediamine. According to the process, the conversion rate of the raw material 1,8-paramenthane diethylamide is greater than 95%, the maximum conversion rate is up to 100%, the selectivity of the product 1,8-paramylenediamine product is more than 90%, the maximum selectivity is up to 97%, the solvent is cheap and reusable, unreacted alkali and generated acetate can be recovered, the product is easily separated and has high yield, and the method has the advantages of simple operation, environmentalfriendliness, high economy and the like.
Synthesis and Herbicidal Activities of p-Menth-3-en-1-amine and Its Schiff Base Derivatives
Zhu, Shouji,Xu, Shichao,Jing, Wang,Zhao, Zhendong,Jiang, Jianxin
, p. 9702 - 9707 (2017/01/06)
p-Menth-3-en-1-amine, 4, and its Schiff base derivatives, 5a-l, were designed and synthesized. They were characterized by FT-IR, ESI+-MS, HRMS, 1H NMR, and 13C NMR spectral analyses, and their pre-emergence herbicidal activities against ryegrass were evaluated. All of the compounds showed excellent herbicidal activity. The Schiff bases showed stronger herbicidal activities than the original amine 4. These compounds showed herbicidal activities comparable to that of glyphosate. The herbicidal activities of 5k and 5l against ryegrass shoot growth were 78.3 and 355.6% higher than that of glyphosate, respectively. Furthermore, the introduction of a chlorine or bromine atom into the Schiff base derivatives containing a furan or benzene ring was beneficial to increase the activity. However, the herbicidal activities were not clearly affected when the heteroatom of the five-membered heterocyclic Schiff base or the position of the substituent on pyridine Schiff base was altered.
Process for preparing 1-oxa-3,8-diaza-4-oxo-spiro-[4,5]-decanes
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, (2008/06/13)
1-Oxa-3,8-diaza-4-oxo-spiro-[4,5]-decane compounds of the formula STR1 are new light stabilizers for protecting polymers from the damaging effect of UV radiation.