Green Synthesis of Poly(aminomethylenephosphonic) Acids
摘要:
The reaction of polyamines with phosphorous acid and formaldehyde in water under focused microwave irradiation provides a facile and rapid synthesis of poly(aminomethylenephosphonic) acids.
DOI:
10.1080/10426501003724897
作为试剂:
描述:
2-溴吡啶 、 1,3-丙二胺 在
2,2-丙烷二胺 、 水 、 氯仿 、 potassium carbonate 作用下,
以
吡啶 为溶剂,
反应 2.5h,
以to give 2-(3-aminopropylamino)pyridine 13.3 g (70%) b.p. 90°-91° C., 0.02 mm Hg的产率得到N-(2-pyridinyl)-1,3-propandiamine
A cyclic amidine typically having the formula: ##STR1## wherein R.sup.1 represents an organic radical, X represents a direct bond or a divalent organic radical and A and B each represent hydrogen or an organic radical is prepared by a liquid phase reaction of a nitrile of the formula R.sup.1 CN where R.sup.1 has the same meaning as above, with a polyamine typically having the formula: ##STR2## where X, A and B have the same meaning as above, in the presence presence of a mixture of a titanium compound with water.
申请人:Elizabeth Arden, Co., Division of Conopco, Inc.
公开号:US05451691A1
公开(公告)日:1995-09-19
A method of synthesis of .omega.-hydroxy fatty acid containing ceramides having the general structure (1). ##STR1## where A represents CH.sub.2 or --CH.dbd.CH--Y represents a residue of a C.sub.14 to C.sub.22 fatty acid having the structure (2) ##STR2## where Z is --OH or an epoxy oxygen x is an integer of from 12 to 20 y is an integer of from 20 to 40 z is 0 or an integer of from 1 to 4 a is an integer of from 8 to 50 b is an integer of from 10 to 100 and n is an integer of from 7 to 27.
R-isomer of beta amino acid compounds as integrin receptor antagonists derivatives
申请人:Rogers Thomas
公开号:US20050020505A1
公开(公告)日:2005-01-27
The present invention relates to a class of compounds represented by the Formula I
or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising compounds of the Formula I, and methods of selectively inhibiting or antagonizing the α
v
β
3
and/or the α
v
β
5
integrin without significantly inhibiting the α
v
β
6
integrin.
The reaction of polyamines with phosphorous acid and formaldehyde in water under focused microwave irradiation provides a facile and rapid synthesis of poly(aminomethylenephosphonic) acids.