113068-75-0

Upstream product

• 623-05-2 (4-hydroxyphenyl)methanol 
• 58479-61-1 tert-butylchlorodiphenylsilane 
• 500110-77-0 1-(tert-Butyl-diphenyl-silanyloxy)-4-(tert-butyl-diphenyl-silanyloxymethyl)-benzene 

Downstream Products

• 113086-18-3 (5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-[4-(tert-butyl-diphenyl-silanyloxymethyl)-phenoxymethyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester 

Relevant academic research and scientific papers

A novel and convenient chemoselective deprotection method for both silyl and acetyl groups on acidic hydroxyl groups such as phenol and carboxylic acid by using a nitrogen organic base, 1,1,3,3-tetramethylguanidine

(Matrix presented) 1,1,3,3-Tetramethylguanidine (TMG)1, a nitrogen organic base, is a convenient and useful reagent for chemoselective deprotection of both silyl and acetyl groups on acidic hydroxyl groups such as phenol and carboxylic acid without affecting aliphatic silyl and acetyl groups. The chemoselectivity is dependent on the acidity of the hydroxyl group.

DBU-mediated mild and chemoselective deprotection of aryl silyl ethers and tandem biaryl ether formation

An efficient method for the selective cleavage of aryl silyl ethers is established using 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). With either 1.0 or 0.10 equivalent of DBU, smooth desilylation of various aryl silyl ethers was accomplished selectively in the presence of alkyl silyl ethers and other base-sensitive groups such as acetate and ester. In addition, direct transformation of aryl silyl ethers into biaryl ethers using a catalytic amount of DBU was possible through tandem desilylation and SNAr reaction with activated aryl fluorides. Georg Thieme Verlag Stuttgart.

THERAPEUTIC AGENTS AND CONJUGATES THEREOF

The present disclosure provides a class of conjugates of general formula (X), a class of TLR9 agonist derivatives, such as formula (I), (XX), and (XXI), certain diastereomers of STING agonists, a class of STING agonist derivatives, such as formula (XXVIV), a class of heterocyclic compounds of general formula (II), a class of heterocyclic compounds of general formula (III), as defined herein. A1, A2, T, Z1, Z2, Z3, b1, and b2, in formula (X) are defined herein. The conjugate provides unique properties that are based upon the properties of the therapeutic agents that are part of the conjugate. Also provided are methods of synthesis and use of compounds.

A mild and efficient method for the selective deprotection of silyl ethers using KF in the presence of tetraethylene glycol

A mild and efficient protocol for the deprotection of silyl ethers using KF in tetraethylene glycol is reported. A wide range of alcoholic silyl ethers can be selectively cleaved in high yield in the presence of certain acid- and base-labile functional groups. Moreover, the phenolic silyl ethers were cleaved exclusively, without affecting the alcoholic silyl ethers, at room temperature. The Royal Society of Chemistry 2011.