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Sigma-Aldrich

DCA Deblock (0.36M dichloroacetic acid in toluene)

Synonyme(s) :

DCA Deblock, DEBLOCK (0.36M dichloroacetic acid in toluene)

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About This Item

Formule empirique (notation de Hill):
C2H2Cl2O2
Numéro CAS:
Poids moléculaire :
128.94
Numéro MDL:
Code UNSPSC :
12352106
ID de substance PubChem :

Forme

liquid

Niveau de qualité

Concentration

≤100 ppm in H2O

Point d'ébullition

110-111 °C

Densité

0.884 g/mL at 25 °C

Chaîne SMILES 

OC(=O)C(Cl)Cl

InChI

1S/C2H2Cl2O2/c3-1(4)2(5)6/h1H,(H,5,6)

Clé InChI

JXTHNDFMNIQAHM-UHFFFAOYSA-N

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Description générale

Deblock solution, containing dichloroacetic acid (DCA) in dichloromethane or Toluene, removes the dimethoxytrityl (DMT) protecting the group from the 5′ hydroxyl moiety of nucleotides already incorporated into the growing nucleic acid, prior to the addition of the next phosphoramidite. Removal of the DMT allows the unprotected 5′ hydroxyl moiety to react with a new phosphoramidite in a subsequent extension reaction.

Application

DCA Deblock (0.36M dichloroacetic acid in toluene) is suitable for the removal of 4,4Adimethoxytrityl (DMTr) protecting groups for the synthesis of antisense oligonucleotides in high yield and purity.

Mention d'avertissement

Danger

Classification des risques

Aquatic Chronic 3 - Asp. Tox. 1 - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Lact. - Repr. 1B - Skin Irrit. 2 - STOT RE 2 Inhalation - STOT SE 3

Organes cibles

Central nervous system

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

41.0 °F

Point d'éclair (°C)

5 °C

Équipement de protection individuelle

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

A H Krotz et al.
Bioorganic & medicinal chemistry, 7(3), 435-439 (1999-04-29)
It is demonstrated that a solution of dichloroacetic acid in toluene removes dimethoxytrityl groups from the 5'-terminus of an antisense phosphorothioate oligodeoxyribonucleotide (ISIS 5132/CGP69846A) during synthesis on solid support cleanly and efficiently. It is therefore suggested to replace health hazardous
Synthesis of an antisense oligonucleotide targeted against C-raf kinase: efficient oligonucleotide synthesis without chlorinated solvents
A H Krotz and D L Cole V T Ravikumar
Bioorganic & Medicinal Chemistry, 7(3), 435-439 (1999)
Yi-Hsueh Chuang et al.
Water research, 47(3), 1308-1316 (2013-01-05)
The direct incorporation of chloramines and dissolved organic nitrogen (DON) may provide the nitrogen for nitrogenous disinfection byproducts (N-DBPs). This study explores the contributions of natural DON and chloramine incorporation to the formation of N-DBPs during chloramination. This study also
Mehdi D Esrafili
Journal of molecular modeling, 18(12), 5005-5016 (2012-06-28)
A theoretical study was performed to examine hydrogen and halogen bonds properties in gas phase and crystalline dichloroacetic acid (DCAA). The specific pattern of O-H∙∙∙O, C-H∙∙∙O, HCl, Cl∙∙∙O and Cl∙∙∙Cl interactions in DCAA dimers is described within the quantum theory
Alfredo Caro-Maldonado et al.
Journal of immunology (Baltimore, Md. : 1950), 192(8), 3626-3636 (2014-03-13)
B cell activation leads to proliferation and Ab production that can protect from pathogens or promote autoimmunity. Regulation of cell metabolism is essential to support the demands of lymphocyte growth and effector function and may regulate tolerance. In this study

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