Detail of "3973-18-0"

CAS Number:
3973-18-0
Name:
Ethanol,2-(2-propyn-1-yloxy)-
Superlist Name:
Propynol ethoxylate
Molecular Structure:
Formula:
C₅H₈O₂
Molecular Weight:
100.12
Synonyms:
Ethanol,2-(2-propynyloxy)- (6CI,7CI,8CI,9CI);2-(2-Propynyloxy)ethanol;2-(Propargyloxy)ethanol;2-Propynoxyethanol;3-(2-Hydroxyethoxy)-1-propyne;4-Oxa-1-hexyn-6-ol;Ethylene glycol monopropargyl ether;
EINECS:
223-601-1
Density:
1.014 g/cm³
Boiling Point:
168.7 °C at 760 mmHg
Flash Point:
68.9 °C
Appearance:
Colorless to yellowish liquid

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Reference

Studies on the synthesis of richardianidin-1 via the tautomer-arrested annulation of Fischer carbene complexes: All Rights Reserved. Studies on the synthesis of richardianidin-1 via the tautomer-arrested annulation of Fischer carbene complexes. Bos, Mary Ellen; Loncaric, Catherine; Wu, Chunrui; Wulff, William D. ( Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA). Synthesis, (21), 3679-3705 (English) 2006 Georg Thieme Verlag. CODEN: SYNTBF. ISSN: 0039-7881. DOCUMENT TYPE: Journal CA Section: 30 (Terpenes and Terpenoids) Section cross-reference(s): 29 The use of intermol. or intramol. tautomer-arrested cyclizations/cycloaddns. of chromium carbene complexes such as I with alkynes such as II [TIPS = (Me2CH)3Si] to give hydroindenes such as alkenyldihydroindenone III is explored as a potential route for the total synthesis of richardianidin-1 IV. Alkynes are tethered to the chromium carbenes through the oxygen substituents at the carbene carbon atoms of the chromium carbene for use in intramol. tautomer-arrested cyclizations. Intramol.In this article, certain chemicals are used. One of their cas registry numbers is 922721-81-1 tautomer-arrested annulations of alkynyloxy-substituted chromium carbenes depend on the nature of the tether and on the alkyne substituents. In addn. to the desired hydrindenone products, naphthalenediones and spirocyclohexadienones (derived from carbonyl insertion reactions followed by cyclization) are isolated in some cases. The optimal length of the tether between the alkyne and the carbene carbon for intramol. cyclization of an alkynyloxy-substituted chromium carbene to the tautomer-arrested product is four atoms. Yields for intramol. reactions of alkynyloxy-substituted chromium carbenes in which the alkyne terminus possess a substituent larger than a Me group are substantially lower than cyclizations of alkynyloxy-substituted chromium carbenes with a Me or a hydrogen substituent at the alkyne terminus; this renders the intramol. cycloaddn. of alkynyloxy-substituted chromium carbenes unsuitable for a synthesis of IV. Intermol. tautomer-arrested annulation reactions such as the reaction of I with 4-methyl-2-pentyne are more regioselective than the normal benzannulations and more tolerant of substitution at the alkyne termini. Using this method, III is prepd. in 40% yield as an E:Z mixt. by cycloaddn. of I with II; III possesses appropriate substituents for use as an intermediate in the synthesis of IV. .

Compositions and method for electroplating: Compositions and method for electroplating. Harbulak, Edward Paul (M and T Chemicals, Inc., USA).Several substances are used for example 3973-18-0 and 11101-13-6 which are their cas registry numbers. Ger. Offen. DE 2642666 24 Mar 1977, 44 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C25D003-12. PRIORITY: US 75-615195 22 Sep 1975. DOCUMENT TYPE: Patent CA Section: 72 (Electrochemistry) Org. disulfide compds. are used as additives for electroplating of Co, Fe, and Ni and their binary and ternary alloys in aq. acid baths. A typical bath for Co plating contained: CoSO4.7H2O 300, CoCl2.6H2O 60, H3BO3 45, Na o-sulfobenzimide 3.6, and 1,4-di-(.beta.-hydroxyethoxy)-2-butyne 0.1 g/L and was used at 55.degree. and pH 3.6. The resulting Hull test plate made at 2 A and with magnetic stirring was overall bright with the exception that a thick erratic haze was present on the edge of the plate with the lower c.d. of 1.2 A/dm2 resulting in sharp lines of demarkation. The addn. of 79 .mu.mol/L of Na 3,3'-dithiopropionate to the bath eliminated this. .

Detail of "3973-18-0"

Ethanol,2-(2-propyn-1-yloxy)-

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Reference