Dichlorodimethylsilane → 2,4,8,10-Tetra-t-butyl-6,6-dimethyl-dibenzo[d,f][1,3,2]dioxasilepin

Participants

Role	Name	HCID	Charge
Reactant	Dichlorodimethylsilane	HCID 6398	—
Reactant	Triethylamine	HCID 8471	—
Reactant	3,3',5,5'-Tetrakis(1,1-dimethylethyl)(1,1'-biphenyl)-2,2'-diol	HCID 80808	—
Product	2,4,8,10-Tetra-t-butyl-6,6-dimethyl-dibenzo[d,f][1,3,2]dioxasilepin	HCID 13244755	47%

Reaction Steps

Utilizing procedure of Example 1, this compound is prepared from 25.8 grams (0.20 mole) dichlorodimethylsilane, 82.1 grams (0.20 mole) 3,3',5,5'-tetra-tert-butyl-biphenyl-2,2'-diol and 40.5 grams (0.40 mole) of triethylamine. Recrystallization from 2-butanone gives 43.7 grams (47%) of a white powder, mp 170°-176° C.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US04503243
Source dataset	uspto-grants-1985_03
ORD ID	ord-e7f9195b1f454d0e832b7a1c687a8c29
Source note	uspto-grants-1985_03