Boise Cascade Corp. has agreed in principle...

Boise Cascade Corp. has agreed in principle to sell most of the assets of its Specialty Paperboard division for an undisclosed price to a private investment group, but Boise will retain a 30% equity interest . . . Salomon Bros. Inc., the brokerage arm of Salomon Inc., said it and investor group Miller Tabak Hirsch & Co. will buy Grand Union Co., an Elmwood Park, N.J.-based supermarket chain, in a $1.2-billion deal . . . Aca Joe, a San Francisco-based chain of men’s clothing stores that has been operating under bankruptcy court protection since last May, announced that its reorganization plan was approved by Federal Bankruptcy Judge Lloyd King. . . . Standard & Poor’s Corp. has assigned a rating of B-minus to $100 million of Vons’ senior debt, and affirmed the B-minus rating on a previous senior-debt offering of $245 million.