-
公开(公告)号：DE3643007A1
公开(公告)日：1988-06-30
申请号：DE3643007
申请日：1986-12-17
Applicant: BASF AG
Inventor： HESSE ANTON DR , TRAUTMANN WALTER DR , HENKES ERHARD DR
-
公开(公告)号：DE3625006A1
公开(公告)日：1987-04-30
申请号：DE3625006
申请日：1986-07-24
Applicant: BASF AG
Inventor： TRAUTMANN WALTER DR , HLAWITSCHKA WERNER , HENNE ANDREAS DR , WEBER WILHELM DR
Abstract: Photoreactor for photochemical syntheses, comprising, concentrically arranged from the inside to the outside, a lamp (4) with the electrical connections, an annular lamp cooler (5) made of glass with connections for a cooling medium flowing in and out and a reaction space (6) delimited by the outer casing of the lamp cooler and by the inner casing of the reactor (1) having a metal-coated interior wall, an apparatus (7) equipped with brushes or wipers (8) rotating in the reaction space, which apparatus is arranged so that on operation of the photoreactor, the outer casing of the lamp cooler is kept free from a light-absorbing deposit.
-
公开(公告)号：DE3433959A1
公开(公告)日：1986-03-27
申请号：DE3433959
申请日：1984-09-15
Applicant: BASF AG
Inventor： LEININGER HARTMUT DR , LITTMANN WOLFGANG DR , PAUST JOACHIM DR , TRAUTMANN WALTER DR
IPC: C07D241/20 , C07D403/04 , C07D209/48
Abstract: 2-Amino-3,5-di-(halomethyl)-pyrazines of the general formula I (I) where X is either chlorine or bromine, m and n may each be 0, 1, 2 or 3 and R1 and R2 are each hydrogen or a protective group or may furthermore be bonded to one another, in particular those compounds of the formula I in which m is 1 and n is 2 and/or R1 and R2 together form a phthaloyl radical, are useful intermediates for the pteridine building block of folic acid or folic acid analogs. They are obtained by a method in which a 2-amino-3,5-dimethylpyrazine of the general formula II (II) is treated with a chlorinating or brominating agent and, where R1 and/or R2 are protective groups, these are, if desired, eliminated when the chlorination or bromination is complete.
-
-
Search Results
23
records
(took 0.022 seconds)
