Parikh–Doering oxidation–dehydration–Ugi cyclization cascade in the development of lactams from formidoalkanols (3>chain length>7)
摘要:
De novo incorporation of N-formylated aminols as strategic substrates in legendary Ugi cyclization. Lactamization of N-formido alkanols is accomplished by a novel Parikh Doering oxidation dehydration Ugi cyclization cascade leading to the formation of lactams up to eight carbons (ring size; n=1-4) in moderate yields using formidoaminol, substituted aniline, and aliphatic/aromatic carboxylic acid derivatives as starting materials. (C) 2011 Elsevier Ltd. All rights reserved.
A more sustainable and highly practicable synthesis of aliphatic isocyanides
作者:K. A. Waibel、R. Nickisch、N. Möhl、R. Seim、M. A. R. Meier
DOI:10.1039/c9gc04070f
日期:——
A more sustainable and easier applicable synthesis of aliphatic isocyanides in DMC is introduced using non-hazardousp-toluenesulfonyl chloride as dehydration reagent.
Coating compositions containing polymers with isocyano groups and nickel
申请人:E. I. Du Pont de Nemours and Company
公开号:US04251421A1
公开(公告)日:1981-02-17
This invention relates to cross-linkable film-forming compositions which contain a polymer with pendant isocyano groups and a nickel oligomerization catalyst and to the use of the compositions in ambient temperature-cure finishes.
Coating compositions containing polymers with isocyano groups and
申请人:E. I. Du Pont de Nemours and Company
公开号:US04251422A1
公开(公告)日:1981-02-17
This invention relates to cross-linkable film-forming compositions which contain a polymer with pendant isocyano groups and a trialkylborane cross-linking agent and to the use of the compositions in ambient temperature-cure finishes.
The present invention provides a compound having the following general formula (I) which is useful as a neurokinin receptor antagonist:
(wherein,
R
1
, R
2
: optionally substituted (hetero)aryl,
R
3
: —CO—R
4
, —CO—O—R
4
, etc.,
R
4
: alkyl, cycloalkyl, etc.,
A: CH
2
, CO, SO
2
, B: a single bond, etc.,
D: oxygen, CH
2
, E: alkylene, alkenylene, n: 1 to 3).
1. Farbstoffe der Formel
worin R1, R2 = H oder Substituent R3 = H oder Substituent R4 = H oder Alkyl B = Brückenglied Z = H oder faserreaktiver Rest, n = 0 oder 1. eignen sich zum Färben und Bedrucken hydroxylgruppen-und amidgruppenhaltiger Materialien.
1. 式中 R1、R2 = H 或取代基 R3 = H 或取代基 R4 = H 或烷基 B = 搭桥基 Z = H 或纤维反应基,n = 0 或 1 的染料,适用于含有羟基和酰胺基的染色和印花材料。