Detail of "18984-21-9"

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CAS Number:
18984-21-9
Name:
Benzene,2,4-dichloro-1-(2-nitroethenyl)-
Molecular Structure:
Formula:
C₈H₅Cl₂NO₂
Molecular Weight:
218.04
Synonyms:
Styrene,2,4-dichloro-b-nitro-(7CI,8CI);2,4-Dichloro-1-(2-nitrovinyl)benzene;2,4-Dichloro-b-nitrostyrene;NSC 81882;
Density:
1.447 g/cm³
Melting Point:
114-119 °C
Boiling Point:
334.1 °C at 760 mmHg
Flash Point:
155.9 °C
Hazard Symbols:
Xn,N,Xi
Risk Codes:
22-36-50/53
Safety:
26-36-60-61 Details

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Michael additions in water of ketones to nitroolefins catalyzed by readily tunable and bifunctional pyrrolidine-thiourea organocatalysts: All Rights Reserved. Michael additions in water of ketones to nitroolefins catalyzed by readily tunable and bifunctional pyrrolidine-thiourea organocatalysts. Cao, Yi-Ju; Lai, Yuan-Yuan; Wang, Xiang; Li, Yong-Jian; Xiao, Wen-Jing (Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei 430079, Peop. Rep. China). Tetrahedron Letters, Volume Date 2007, 48(1), 21-24 (English) 2006 Elsevier Ltd. CODEN: TELEAY. ISSN: 0040-4039. 18984-21-9 is the cas registry number of certain chemical which is used as reagents here. DOCUMENT TYPE: Journal CA Section: 21 (General Organic Chemistry) An operationally trivial and environmentally benign procedure for direct Michael addn. was developed. The reaction of various ketones with nitroolefins can be performed in water to afford the corresponding nitro compds. in high yields in the presence of a pyrrolidine-thiourea organocatalyst at 35 °C. The reaction exhibits a high stereoselectivity, with high enantioselectivities (up to 99%) as well as diastereoselectivities (up to ) being achieved under the optimal conditions. .