公开(公告)号：US3374290A

公开(公告)日：1968-03-19

申请号：US50611265

申请日：1965-11-02

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： FRANKE NORMAN W ,  MARTINI JOSEPH C

IPC: C08L23/06

CPC classification number: C08L23/06 ,  C08L23/20 ,  C08L23/24 ,  C08L2666/06

公开(公告)号：US3598842A

公开(公告)日：1971-08-10

申请号：US3598842D

申请日：1969-03-24

Applicant: GULF RESEARCH DEVELOPMENT CO

Inventor： MARTINI JOSEPH C

IPC: C07D307/79 ,  C07D307/92 ,  C07D311/78 ,  C07D5/36

CPC classification number: C07D307/79 ,  C07D307/92 ,  C07D311/78

Abstract: A PROCESS IS DEFINED FOR THE PREPARATION OF CYCLIC ETHERS BY THE CONDENSATION OF PHENOLICS, SUCH AS PHENOL, WITH CERTAIN ALDEHYDES CONTAINING TERTIARY CARBON ATOMS, SUCH AS ISOBUTYRALDEHYDE, USING A STRONG ACID CATALYST, SUCH AS H2SO4. THE SINGLE RING PHENOLICS PRODUCE ALKYLATED COUMARAN TYPE CYCLIC ETHERS SUCH AS 2,2-DIMETHYL COUMARAN. THE TWO CONDENSED RING PHENOLICS, SUCH AS BETANAPHTHOL, PRODUCE THE ALKYLATED NAPHTHOFURAN TYPE CYCLIC ETHERS. BETA-NAPHTHOL IS UNIQUE IN ALSO PRODUCING 3,4,5,6DINAPHTHO-2-ISOPROPYLPYRAN, A COMPOSITION OF MATTER USEFUL AS AN ULTRAVIOLET LIGHT ABSORBER. THE AQUEOUS HYDROGEN HALIDES ARE UNIQUE IN PROMOTING THE SELECTIVE CONDENSATION OF META-CRESOL WITH ISOBUTYRALDEHYDE FROM ADMIXTURE WITH PARA-CRESOL TO ALLOW FOR THE SEPARATION AND RECOVERY OF SUBSTANTIALLY PURE PARA-CRESOL.