General procedure for synthesis

General Procedure for Synthesis of Thioglycosides from Peracetylated Hexapyranosides Promoted by BF3-Etherate [5-10]... 

Brown, H. C., Singaram, B. The development of a simple general procedure for synthesis of pure enantiomers via chiral organoboranes. 

A general procedure for synthesis of terminal episulfides of hexoses or hexitols consists in the action of potassium thiolacetate on an appropriately substituted 5,6-di-O-p-tolylsulfonyl derivative, followed by treatment of the resultant 6-(S-acetyl-6-thio-5-0-p-tolylsulfonyl derivative with cold, methanolic, sodium methoxide the reaction involves rearside attack on C-5 by the sulfur atom at C-6, to displace the p-tolylsulfonyloxy group with inversion.This procedure was used for the synthesis of 5,6-dideoxy-5,6-epithio-l,3 2,4-di-0-ethylidene-L-iditol (82), 5,6-dideoxy-5,6-epithio-l,2 3,4-di-0-isopropylidene-L-guUtol (83), and 5,6-dideoxy-5,6-epithio-1,2-0-isopropylidene-/3-L-idofuranose (84), from 1,3 2,4-di-0-ethylidene-... 

Modification of surface chromate species on the Phillips catalyst using various types of organic silanols could be a general procedure for synthesis of various novel Cr-based polymerization catalysts. The reactions are shown in Scheme 20 for Cat-A and Cat-B. The first example of Cat-A was reported by Cann and coworkers through the reaction between TPS and a Phillips catalyst with the original purpose of transformation of the Phillips catalyst into UCC S-2 catalyst in order to avoid the use of toxic and expensive BC [27]. In our opinion, the Cat-A was similar to the UCC S-2 catalyst but differed with respect to the simultaneously formed surface... 

Another general procedure for synthesis of novel Cr-based ethylene polymerization catalysts could be through modification of surface residual hydroxyl groups on a Phillips catalyst using various types of organometallic compounds, which could be chemically anchored on the catalyst surface and provide extra active sites for... 

General Procedure for Synthesis of Tetrahydropyridine-Fused Indole... 

General Procedure for Synthesis of S-Arylsulfonyl-2-ethy-nylaniline Synthesis of 2-Ethynyl-N-mesitylenesulfonylani-line (Ic)... 

General Procedure for Synthesis of 1,2,3,4-Tetrahydro-P-carboline by Domino Copper-Catalyzed Three-Component Indole Formation and Cyclization with t-BuOK Synthesis of 2-Methyl-l-propyl-2,3,4,9-tetrahydro-lH-pyrido[3,4-hjindole (6a) and 2-Methyl-l-propyl-l,2,3,4-tetrahydropy-razino[l,2-a]indole (8a) (Table 1, Entry 11)... 

General Procedure for Synthesi of 2-Ethynyl-N-methane-sufonylaniline Synthesis of 2-Ethynyl-N-methane sulfonyl-4-methoxycarbonylaniline (lb)... 

General Procedure for Synthesis of (Aminomethyl)isoquino-line-Fused Polycyclic Compounds by Domino Mannich-Type Reaction and Cascade Cyclization Synthesis o/6-/(N,N-Diisopropylamino)methyl]-3,4-dihydro-2H-pyrimido[2,l-SL] isoquinoline (12a) (Table 1, Entry 10)... 

A general procedure for synthesis of alkylbenzenesulfonyl halides has been proposed by heating an alkylbenzene with a halosulfonic acid or at room temperature in the presence of Lewis acids. For example, mesitylene, by stirring with fluorosulfonic acid and antimony pentafluoride at 25 °C (16 hours), gives 2,4,6-trimethylbenzene-l,3-disulfonyl fluoride (66%). 

FIGURE 9. General procedures for synthesis of )8-ketosides (XXIX) and a-ketosides... 

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