1.2- Ethanediamine -tetramethyl

Commercial AT,iV,A7, A -tetramethyl-l,2-ethanediamine was obtained from Aldrich Chemical Company, Inc. and was distilled prior to use (b.p. 119.5°). 

NjChHh, 1,2-Ethanediamine, N,N,N, N -tetramethyl-lithium complex, 26 148 NjCmH, 2,2 -Bypyridine rhenium complexes, 26 82, 83 N2C, H, Azobenzene cobalt and palladium complexes, 26 175, 176... 

A recommended procedure for the preparation of highly hindered cyclic amines is illustrated by the following specific example. Reaction of Nl-isopropyl-2,2-dimethyl- 1,2-ethanediamine (1 eq.), acetone (2 eq.) and chloroform (1.2 eq.) under standard PTC conditions (CH2CI2, 50% NaOH, 2-5% BTAC, 5°C) gives a quantitative yield of a mixture of 1-isopropyl-3,3,5,5-tetramethyl-2-piperazinone and 4-isopropyl-3,3,6,6-tetramethyl-2-piperazinone in the ratio 73 27. More detailed examination of the reaction showed that careful control of the amount of chloroform used was essential, otherwise secondary reactions occurred. The type of secondary reaction which can occur is illustrated by the quantitative transformation of 2,2,6,6-tetramethyl-4-... 

Ethylenediamine, Al,/V,A, A -tetramethyl- 1,2-Ethanediamine,, V,N.N1, h -tetramethyl-[110-18-9], 61,116 Ethylene glycol, 61, 65, 103 Ethyl ether, compared with boron fluoride (BF3)(1 1), 61, 116 Ethylmagnesium bromide, 60, 83 ETHYL threo-[ 1 -(2-HYDROXY-l, 2-DIPHENYL)ETHYL]CARBAMATE, 61,93... 

Dendrimeric rubbery copolymers having a molecular weight of roughly 250,000 daltons and containing siloxane linkages were prepared by the author [6] by copolymerizing 12% styrene and 88% butadiene in combination with of 2-butyl lithium, hexachlorodisiloxane, and A, A, A, A -tetramethyl-1,2-ethanediamine. 

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