Aminopropyltrimethoxysilane → 2,2-Dimethoxy-1,2-azasilolidine

Temperature

130 °C

The procedure of Example 1 was repeated, except that 3-aminopropyltrimethoxysilane (113.5 grams; 0.63 moles) was used. Sodium methoxide (2.3 grams, 2 wt.%) was added. The reaction mixture was stirred and heated to 90° C. to 98° C. for 6 hours at 4-8 mm Hg, while slowly removing distillate. However gas chromatographic analysis indicated 1,1-dimethoxysila-2-azacyclopentane was not formed. The distillate consisted of >99% 3-aminopropyltrimethoxysilane. The reaction mixture was further heated to 130° C. (>10 mm Hg) but distillate analysis again indicated no five-membered ring cyclosilazane product was formed.

1. temperatureheated to 90° C. to 98° C. for 6 hours at 4-8 mm Hg
2. customwhile slowly removing distillate
3. customwas not formed
4. customwas formed

ORD record

ord-bbdfa2ea413c46d7bee3f14982899630

Source dataset

uspto-grants-1994_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05354880